Malicious PDF — malware analysis report

Static analysis result for SHA-256 391e277096c6e767…

MALICIOUS

PDF

67.9 KB Created: 2021-03-01 09:37:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 96a51e4baf64b2451cae2321c4852b31 SHA-1: 5aece30423899c456695b2a546cd9ca097a39c77 SHA-256: 391e277096c6e7679beae142cde8a95fc9c61bead5538d1a76303f2e4b7d7ac7
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://fokemale.ru/wix?keyword=clinical+anatomy+made+ridiculously+simple+goldberg+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4425217/normal_602b2ae522d0b.pdfIn PDF document text
    • http://zuzorovix.scienceontheweb.net/sadlier_vocabulary_workshop_level_e_answers_unit_5_synonyms_and_antonyms.pdfIn PDF document text
    • https://tagopudul.weebly.com/uploads/1/3/5/3/135392217/vuzemuwatidemupar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368969/normal_5fd2ea2ee2123.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477139/normal_5ff69c17b6459.pdfIn PDF document text
    • http://lirinevewafa.mypressonline.com/winozolewifesuwepomaxawe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379491/normal_601ecf486d7c5.pdfIn PDF document text
    • http://wikowezenitezo.medianewsonline.com/cant_decide_what_music_to_listen_to.pdfIn PDF document text
    • http://fukiwurezopukof.mywebcommunity.org/youtube_derek_prince_prayer_and_fasting.pdfIn PDF document text
    • https://putazixuxul.weebly.com/uploads/1/3/1/3/131379121/danusu_nokozojomovon_dobebupaxi.pdfIn PDF document text
    • https://natumelazorog.weebly.com/uploads/1/3/4/7/134711419/wovozitipojer-xulix-vuxefedewugiv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418786/normal_601065a2f0d9a.pdfIn PDF document text
    • https://nupafosudivoz.weebly.com/uploads/1/3/2/6/132682156/warumexivik-jepiwof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469837/normal_6039c835e3fed.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/febopa/soundcraft_ui12_bedienungsanleitung_deutsch.pdfIn PDF document text
    • http://gidufuvez.epizy.com/begipuvojibuviloxugemen.pdfIn PDF document text
    • http://nojikigor.myartsonline.com/37343215211.pdfIn PDF document text
    • https://s3.amazonaws.com/zosevid/44874238577.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/17887846202.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_off0000c9c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9C8 5620 bytes
SHA-256: a805b068e2ccf021468bf5b0e0a314a8e21ec6492cfd4f93de467cb55bb3d036
font_01_sfnt_off0000dcd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD1 10380 bytes
SHA-256: 3d56dd26357ce9357a2b7dc557c9c0818eb77e33a5c41ab83425704ac50675d4

Open this report in the interactive analyzer, or submit your own file for analysis.