Malicious PDF — malware analysis report

Static analysis result for SHA-256 c565be443018f08f…

MALICIOUS

PDF

77.0 KB Created: 2021-09-27 16:00:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: f4bf6c33808b8df925489e51a7b24143 SHA-1: 6f9fb9a88f565a9bc285b1c8496ba3ccba3a3d82 SHA-256: c565be443018f08f90bfd50b01dfe1e9d379993ff9ca407db9a43024bcde6763
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains a link farm with numerous URLs pointing to various domains, many of which appear to be compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded URLs and the nature of the link farm suggest an attempt to lure users to external, potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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://pixomot.ru/uplcv?utm_term=the+hitman%27s+bodyguard+123movies PDF link annotation
    • https://rallstarawards.us/nbloom/fckuploads/file/durirowa.pdfIn PDF document text
    • http://fese.in/ienupdimages/images/files/zokudojevafu.pdfIn PDF document text
    • http://dieukhactransam.com/uploads/files/17081521898.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/9m7s2i39fmnp6s3eq0opn8sktd/47490477167.pdfIn PDF document text
    • http://mashhadgardi724.ir/basefile/mashhadgardi724/files/4928565646.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614c4034db67d---28592840615.pdfIn PDF document text
    • https://network-italia.com/file/rolizopivo.pdfIn PDF document text
    • https://carcarnet.com/home/sandbox/domains/hkdance.tritek.hk/public_html/ckfinder/userfiles/files/5041286007.pdfIn PDF document text
    • https://trungtamgiasuhcmmq.com/uplaod/quangtri/files/winovogoxogedi.pdfIn PDF document text
    • https://maryamghiasi.com/images/upload/files/7863992013.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/t89imutor5tkro0m30nenmfd26/56646312248.pdfIn PDF document text
    • http://www.abcklima.hu/data/editorfile/4369013685.pdfIn PDF document text
    • https://nobelboya.com/userfiles/file/21963249722.pdfIn PDF document text
    • http://albergocavour.com/userfiles/files/musafatolalafa.pdfIn PDF document text
    • http://jurabos.nl/include/editor/file/nolaxelixagadefovedisi.pdfIn PDF document text
    • http://panda-es.tokyo/yamituki-n/uploads/files/rikelurosizuguvipilidiw.pdfIn PDF document text
    • http://goraku-sangyo.com/userfiles/file/buvorilasamononofum.pdfIn PDF document text
    • http://alburigiott.it/userfiles/files/ninuvoxagibagabimob.pdfIn PDF document text
    • https://whiteplacard.com/UserFiles/file/diseresetago.pdfIn PDF document text
    • https://spheresignal.com/app/webroot/userfiles/files/javulepavabixi.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1614118dab316d---71845408322.pdfIn PDF document text
    • http://studiovalentini.eu/userfiles/files/wexavigugovibago.pdfIn PDF document text
    • https://maffart-guy.com/userfiles/file/nemeximiwopokor.pdfIn PDF document text
    • https://mountainbrookbuilders.com/home/mountain/public_html/ckfinder/userfiles/files/puzofogusulipujodop.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b075.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB075 11408 bytes
SHA-256: eb6461330cb1cfc6c1e0d0a4463b2c2462fd6db2ac9c9ca4f82b189cf3d9d102
font_01_sfnt_off0000cb30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB30 14512 bytes
SHA-256: 6274ec1e3af463360acdd58a56d10ace792d5dcf5b23df6a37a2e3577fc815cb
font_02_sfnt_off0000ef57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF57 18500 bytes
SHA-256: cdb089494f8395996fef1f4578ce83ec1ec7f836c3836a6ac9c43d10afde1e70
font_03_sfnt_off00010c39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C39 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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