Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f281021fbf86569…

MALICIOUS

PDF

89.6 KB Created: 2021-05-02 05:58:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 88f94e9ad520c40720b138b60c3eb978 SHA-1: 590fd956790f41255be99cbc1ad2d4e71551faf9 SHA-256: 5f281021fbf86569ad90bb2e2c0b0e639e2ff80517fa8bc36678830828250f35
156 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 0.9994

Heuristics 5

  • 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.
  • 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://dafemum.ru/strik?utm_term=what+is+warriors+into+the+wild+about PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4424328/normal_601fc49204d0e.pdfIn PDF document text
    • http://polobasopika.mywebcommunity.org/66529235688.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379736/normal_5fec3d7a9585b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382617/normal_6027a11e0561f.pdfIn PDF document text
    • http://mupifojoxur.medianewsonline.com/low_carb_vegan_diet_plan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476133/normal_603b596a01a64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417046/normal_6031abacd2ab2.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/nodetuxapabara/40754738551.pdfIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/vatican_assassins_portugues.pdfIn PDF document text
    • https://f79c4d19-9b07-4ca9-ba82-4f938217db57.filesusr.com/ugd/c0d3e8_ae265937667d49f293178b8e50bbc0f2.pdf?index=trueIn PDF document text
    • https://8c0e102b-efba-4641-b7fc-347c26357927.filesusr.com/ugd/d420ee_427daa8b8a08402096c3961d4cf063ca.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/polexebuj/tinevodatawevenedow.pdfIn PDF document text
    • https://s3.amazonaws.com/wemofodi/when_to_use_autoresetevent_and_manualresetevent.pdfIn PDF document text
    • http://futikuzita.onlinewebshop.net/bogirigaxav.pdfIn PDF document text
    • https://s3.amazonaws.com/tasufagijaremo/gameboy_emulator_games.pdfIn PDF document text
    • http://petojijoxura.onlinewebshop.net/xejodan.pdfIn PDF document text
    • https://s3.amazonaws.com/xanunafojuloki/82688791140.pdfIn PDF document text
    • https://b1e6e3cd-24a2-426a-8b7d-e8f4bd81915b.filesusr.com/ugd/83e584_e813b2762a5444669ef0ea6907614a18.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/repomaxinelojo.pdfIn PDF document text
    • https://db244590-af71-4c33-bd6e-2f8f55f31281.filesusr.com/ugd/fdab61_0e1583ec7d3747288a8802ed093e86b2.pdf?index=trueIn PDF document text
    • https://528a8416-53f4-4693-bcf0-540471887af1.filesusr.com/ugd/c3aa89_199387a6df93414b8ffb10dde5ffc248.pdf?index=trueIn PDF document text
    • http://jenotuxeje.onlinewebshop.net/wudepuvabozuzejo.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010ce5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CE5 5784 bytes
SHA-256: 1fb23cf48dc2e255ef28c8e69e42e51b82f518886a46af215dc1ee2f954e5c8c
font_01_sfnt_off00012098.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12098 5160 bytes
SHA-256: b12dad0f974268381f3db2892116370462ab0b04c283690787db6b3fd1c55b68
font_02_sfnt_off0001322d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1322D 11256 bytes
SHA-256: a484c3cac5bae00202c2455f9cecadf7027d7e26ad65602dac98423d4aa34fa8

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