Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a216154391dc86a…

MALICIOUS

PDF

77.2 KB Created: 2021-03-14 04:04:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94875cf23c3cc88afb73afa9d59c14af SHA-1: 20fcfe21a54a738c0df2d1bf0fe6a6142f98f7bf SHA-256: 0a216154391dc86aae380ecd521b4c56ab306ed45406e2b1dcb6080320faa47c
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external URLs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://zajinet.ru/award?keyword=awareness+campaign+pdf
    • http://cashfree.store/831067162520u9gg.pdf
    • http://ig-soft-team.com/summer_escapes_10ft_metal_frame_pool_instructions9yle7.pdf
    • https://jibizixowaxen.weebly.com/uploads/1/3/5/2/135296653/dimevaxone.pdf
    • http://fionainthefield.org/lifomorawiso7sc6c.pdf
    • http://tlgfree.xyz/pocket_door_kit_24_inchrnhjp.pdf
    • https://cdn-cms.f-static.net/uploads/4488822/normal_6041dc533b26e.pdf
    • https://vobulesije.weebly.com/uploads/1/3/1/8/131857334/2bf6b02f9a580ef.pdf
    • http://inmyshtangen.xyz/tujidiwugoxavuwagbiyg8.pdf
    • http://honey-love.ru/xovijafuniwagasemoz2iq0.pdf
    • https://povutepumik.weebly.com/uploads/1/3/2/7/132741486/zujipu_juwawo.pdf
    • http://helpverifedbadges.com/38515693234h5rje.pdf
    • https://cdn-cms.f-static.net/uploads/4415740/normal_6039d1a08d1e7.pdf
    • https://xogofodaromaf.weebly.com/uploads/1/3/4/3/134387758/senitiz_gejebufuj_kotana_boxofaposuratet.pdf
    • https://sazavilekin.weebly.com/uploads/1/3/4/8/134851962/zufibe.pdf
    • http://setofexperience.site/gazojenusoxifesebogemash1yb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tuxalowafokuvo/figexadutikixivofud.pdf
    • https://s3.amazonaws.com/kujapomib/size_of_asterionella_formosa.pdf
    • https://s3.amazonaws.com/tazopaju/59778303625.pdf
    • https://s3.amazonaws.com/nilafafakem/autosar_arxml_format.pdf
    • https://s3.amazonaws.com/wogikokuzotaxa/juzugavokanejo.pdf
    • https://s3.amazonaws.com/sitok/51938763863.pdf
    • https://s3.amazonaws.com/gazitif/the_culture_code_chapter_review.pdf
    • https://s3.amazonaws.com/gupojakami/rogogawojole.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0b4.bin
86a56466c0a961e96e1b566681e03c5448639ba7ab6ed53a368bf1fca7c6688f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B4 5524 bytes
font_01_sfnt_off0001037c.bin
7170fa802e0ccec7f1791b6d6e2bae949740d4f971b90a0c13da638466620012		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1037C 10664 bytes

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