Malicious PDF — malware analysis report

Static analysis result for SHA-256 7712499aad4fd0b8…

MALICIOUS

PDF

91.0 KB Created: 2021-06-28 11:07:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 02ad7de987905d704289197f6855dff1 SHA-1: 5fb86b41559be929d940e491494aa90b6a111d5b SHA-256: 7712499aad4fd0b8fbdea6aea105e33dddad0e6637530d3eb31779f0563a3e76
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many of which point to compromised WordPress sites used for hosting PDF files. The presence of these links suggests an attempt to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/ipsq9mjhd0qbhtm6v1abimvrn1/35345466670.pdf In PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f81ca706f2---21453221901.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d29ea6b3515---73023520694.pdfIn PDF document text
    • http://mevlanaasm.com/resimler/files/sifore.pdfIn PDF document text
    • https://daxitrip.com/basefile/daxitripcom/files/62941282818.pdfIn PDF document text
    • http://rotarylaspalmas.org/documentos/file/2812302370.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/1608bde0c9c58c---29320185443.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/6ab91tp3nnse0nb24s7e37j1f2/nemometutufawegejoponij.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/hu2ohg0c76dflu69kv9s4stc5o/6288972573.pdfIn PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/kerukif.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/fmj7e1i078r0bqi0gcd4uu6lt0/bimevakelomimuziseje.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/r8g85ju6mss0n4cm1qrmqheuc1/vewomareninaxuxunutosod.pdfIn PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/65ameehm7bh1v81n5mt2qa63e7/dasekuxowasawovi.pdfIn PDF document text
    • https://sportsht.com/userfiles/file/77975295252.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160907dfea6cd3---20540174522.pdfIn PDF document text
    • http://cleangroupbd.com/ck/upload/files/sivudevovesefotakuxobar.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc59bbb27e---sibaxitubadup.pdfIn PDF document text
    • http://xlsferrosilicon.com/d/files/votibadufobudej.pdfIn PDF document text
    • http://metabolit-plus.ru/files/file/17590485827.pdfIn PDF document text
    • http://etcad.net/np/upfile/file/geginure.pdfIn PDF document text
    • http://efuegypt.org/userfiles/file/47845766822.pdfIn PDF document text
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/43fb304c5baf0020e6b406ab2e6da883/tivesesidigunakutot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=formula+to+find+area+of+equilateral+trianglePDF link annotation
    • 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_off0000ff2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF2D 10752 bytes
SHA-256: 2cadd7595fb7af17b5ec8db7dbbc8e371861366b34b6d625017b6d823c7af09e
font_01_sfnt_off00011749.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11749 17920 bytes
SHA-256: da2df02951b7bd166cba45169d2354667e4009c15752d4611cca9315e7ddacd2
font_02_sfnt_off00014689.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14689 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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