Malicious PDF — malware analysis report

Static analysis result for SHA-256 3260945332af8ad7…

MALICIOUS

PDF

77.0 KB Created: 2021-09-02 06:53:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: edfb5174dbcd9183ad48642c149e5942 SHA-1: c14bb25f667a7a6096599467eb34850887840430 SHA-256: 3260945332af8ad71f1c279512587206bd7c256b94fa969e593a54cc937a1d64
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm or redirection mechanism. The presence of these links indicates an attempt to direct the user to external, potentially malicious, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160923426daadc---dugudejeg.pdf In PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a7043eb704bd3ffec8ff7b404bee07af/59413172108.pdfIn PDF document text
    • http://copy2d.com/ftp/image/file/49433517355.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/f367a8130b0b68bae7641c13ef3ec6a4/jifuvimujeripi.pdfIn PDF document text
    • https://avela.md/userfiles/file/lirakixotajuxefebujar.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c821ca7fa9---18433519627.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16078c8f40df60---zirojawepinitudutip.pdfIn PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/2b662997a0e356b33fb028528ed457d0/49409089033.pdfIn PDF document text
    • http://hoteldarim.ir/basefile/hoteldarimir/files/97164726860.pdfIn PDF document text
    • https://onecre.com/images/content/files/zapazunefozoxoziwenubun.pdfIn PDF document text
    • https://ctcitsupport.com/media/files/pigisasixiwawop.pdfIn PDF document text
    • https://psychologgia.pl/Upload/file/59305482211.pdfIn PDF document text
    • http://amexeuro.com/an3_Uploads/file/wejodavudesid.pdfIn PDF document text
    • http://harchovyk.com/userfiles/file/nolasovavevubufobirazigik.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/622728e9d7ade68a7b74d9b9489c7174/menij.pdfIn PDF document text
    • https://menlopark.com/wysiwygfiles/file/wufudigagorewu.pdfIn PDF document text
    • http://secondhandgraphics.com/usrfiles/file/81990564840.pdfIn PDF document text
    • https://www.frontieregypt.com/sites/all/libraries/ckfinder/userfiles/files/35716260988.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607324f286a2f---80058713382.pdfIn PDF document text
    • https://mtydizayn.com/userfiles/file/vexuworibawew.pdfIn PDF document text
    • http://businessplan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/mowugisat.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=behave+in+past+tensePDF 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_off0000ca52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA52 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e269.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE269 10204 bytes
SHA-256: 7de6e894bffa4bf33afc4d8133935c9c068573de838ae0c4389c991b24f7650c
font_02_sfnt_off0000f949.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF949 17708 bytes
SHA-256: d2979b473e320bd192ec39241c41f769c868951a11b21ee9725012d637b1b6bb

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