Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8127722569834a0…

MALICIOUS

PDF

88.6 KB Created: 2021-07-02 03:07:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 811b67699cfd51599cddc00b30054243 SHA-1: cb9fe8fdb395f4db5eded728d22e6a48769a16ff SHA-256: d8127722569834a0c2f07273aaa0b3e7a66d07f00d3c27233fcf98e272fbfa31
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. These links likely lead to phishing pages or further malware downloads, indicating a malicious intent to deceive or infect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://garglob.ru/uplcv?utm_term=things+that+start+with+w+for+kids PDF link annotation
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/28a56d496b1f90ac4b73eee1aee11f94/velelezojoji.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0641af03ab---62233671635.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608fc60a34536---gedevakagusuletaf.pdfIn PDF document text
    • https://warungmimpishio2.com/contents//files/26366255934.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/2542dd4374e301b9a1cd57e81f4a3dac/zosepanajixaxutewoze.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160c9d68e9b94e---69066440843.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/d61d06ec7ad6171c0bcb9fec22fea30e/51825930802.pdfIn PDF document text
    • http://www.macrolepidoptera.hu/userfiles/files/wexumum.pdfIn PDF document text
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a5493a555ce---81068069415.pdfIn PDF document text
    • http://scouttautomotive.com/editor_uploads/system/files/ragiwomawelelovabem.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160910146eaccb---kuraxavidelufamanon.pdfIn PDF document text
    • https://gionggiacam.com/ckfinder/userfiles/files/sagesirizixifuzaxa.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/epo9738mrcmepbl36o1lopeg58/bakalilavenekopaz.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/gilifen.pdfIn PDF document text
    • https://dcoderesearch.com/uploads/mumuferatonazogeji.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4b2090cab6---86062380345.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b40897250c5---56867369383.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/b7b8817dcfb4c078e6e6cf96d38b0a83/piwirufekaxufeneteti.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d5c37c48f84---57924940648.pdfIn PDF document text
    • http://tischlerei-schlusche.de/sites/default/files/file/98868337782.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/b15249336ef27d946dfb985e4c8ab051/51529481494.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d456a2ea2a---65243445247.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/1b2304c8657b075303cae38b3e28d1f7/vinakuge.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609f9c4e57a11---minagagemobevem.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/295b550e9659b6ab8f573835dbc7ebfa/43267289249.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f05b524431---xeloxabujeloxibenejeve.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/16089bca14c4cb---54483926158.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd0bfa5950---97532778786.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E7 17720 bytes
SHA-256: 77724b9a3fe6d82e46e1f6f433c08c83410eaa314e96ce4b280926d0878f2a25
font_01_sfnt_off000124b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124B6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013ccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CCD 10596 bytes
SHA-256: d594796b8b612fdf5f155b88d4518c5007f5784152cb24cbae504347e1effa23

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