Malicious PDF — malware analysis report

Static analysis result for SHA-256 80ff1a07b64152ba…

MALICIOUS

PDF

79.1 KB Created: 2021-04-06 01:37:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 02c3fac767c4a05b888001a85ad53c2a SHA-1: e5335e448e4428400ff46a13cf318b601bad82fa SHA-256: 80ff1a07b64152ba3a0a9453147676fe89cecd4a0472051472ca2b476414f651
186 Risk Score

Malware Insights

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

The file is a PDF containing a significant number of external links, identified as a link farm hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or scamming. While no scripts were explicitly extracted, the PDF structure and numerous external URIs suggest it's designed to redirect users to malicious sites, potentially leveraging embedded JavaScript for obfuscation or further redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://druttle.ru/strik?utm_term=is+sanyo+dp42841+a+smart+tv PDF link annotation
    • https://cdn.sqhk.co/rudixika/ijIhgje/jezujusugenigika.pdfIn PDF document text
    • https://cdn.sqhk.co/puberufibo/bKjfPGD/97292163379.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/qCFbfIF/free_funeral_program_brochure_psd_template.pdfIn PDF document text
    • http://nikecortez.net/what_is_greek_religion_beliefsui3tf.pdfIn PDF document text
    • http://sesalon.xyz/538242039143lqne.pdfIn PDF document text
    • https://cdn.sqhk.co/gurudulep/Z4hhhjU/tegezedarozazenogub.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451753/normal_5fe1553fe3a4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406809/normal_6048cf1a591b7.pdfIn PDF document text
    • http://specrazreshenie.com/unibet_app_for_androidf5jpn.pdfIn PDF document text
    • https://cdn.sqhk.co/selodiro/iihbGUy/electronic_press_kit_template_website.pdfIn PDF document text
    • http://teplotronic.ru/46476806731yxjcj.pdfIn PDF document text
    • http://blacklaser.ru/79611223932jlfr4.pdfIn PDF document text
    • http://jazapugom.iblogger.org/how_long_will_a_mini_split_last.pdfIn PDF document text
    • http://evilcheats.fun/how_many_calories_in_soft_taco_supremejpk0e.pdfIn PDF document text
    • http://safetymirrors.xyz/assured_tenancy_agreement_scotland_templatexfp3v.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485440/normal_5fefeae6c5288.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://efa91360-7c21-416c-9d60-3189e0beb381.filesusr.com/ugd/42ffc7_6ece9be09f3d4cf6be3d8015f1c286af.pdf?index=trueIn PDF document text
    • https://178c1879-e916-404b-9861-a2431bd0f83a.filesusr.com/ugd/1aace6_41661730de4c431a8c5e88c833547f57.pdf?index=trueIn PDF document text
    • https://3350d16e-2476-487b-844f-3942c02081ad.filesusr.com/ugd/25270e_25267da82bf14a5982fc413865eae0ab.pdf?index=trueIn PDF document text
    • http://kevebavan.epizy.com/521576415.pdfIn PDF document text
    • http://lusalelafujijo.epizy.com/breakout_edu_answers_haunted_park.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E1 5640 bytes
SHA-256: 14a57583d94f9660deee2dbdaddf2cfdea858a1fad1aaa88ccda360a82aa45c3
font_01_sfnt_off00010b15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B15 10536 bytes
SHA-256: 03af1d4faafad7f05de3dae3ea5c8fa4fd95b6d1a9926a3103b07366e83f8f8a