Malicious PDF — malware analysis report

Static analysis result for SHA-256 76f8273a68c9429a…

MALICIOUS

PDF

80.3 KB Created: 2021-03-31 02:20:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: f187aaa7c8173e157cc008217b7f2b0a SHA-1: 02500f45bd1f114271848de048d73a795b216c28 SHA-256: 76f8273a68c9429a36ad2229f39059a52fd976daa7f088c71cc51d576fadead3
126 Risk Score

Malware Insights

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

The sample is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs, including a link farm on disposable hosting, suggesting an attempt to redirect users to malicious sites. The document body, though heavily obfuscated, contains references to 'Annex 1 icao' and application metadata, which could be part of a social engineering lure. No scripts were extracted, but the presence of multiple external links points towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/123?utm_term=annex+1+icao PDF link annotation
    • http://mmmmmme.space/epubtvdpe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421050/normal_60426e9406345.pdfIn PDF document text
    • https://tezifotunojoke.weebly.com/uploads/1/3/0/7/130776805/bafed-vuxudul-wekobi-pepurunaw.pdfIn PDF document text
    • http://ig-verifiedsbadge.com/handels_messiah_hallelujah_chorus_lyricsreadz.pdfIn PDF document text
    • https://nudiwosesi.weebly.com/uploads/1/3/4/3/134317077/fuvevetutisulaz.pdfIn PDF document text
    • http://dfahsdfgjsfg.online/63028579820heqmy.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvexajamu/ALjekif/download_race_kings_mod_apk_unlimited_money.pdfIn PDF document text
    • https://cdn.sqhk.co/jojipimuve/gijEjgi/rust_bucket_car.pdfIn PDF document text
    • http://zajiledafalam.getenjoyment.net/96554690784.pdfIn PDF document text
    • https://cdn.sqhk.co/nejibija/zhf4ie2/missing_person_nyc_what_to_do.pdfIn PDF document text
    • http://suziterunedoloj.sportsontheweb.net/5th_grade_math_minutes_free.pdfIn PDF document text
    • http://vknacruckalaikov123.xyz/cursive_worksheets_to_printkn9mx.pdfIn PDF document text
    • https://cdn.sqhk.co/laripikiwafo/jbfyFhg/viluve.pdfIn PDF document text
    • https://lemefiware.weebly.com/uploads/1/3/4/0/134017231/kivasejibelabo-foforanadud-woberajem-ratajuxigokimiv.pdfIn PDF document text
    • http://trysol.xyz/sat_march_2020_results_daya01c7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385422/normal_5fc95ebb216dd.pdfIn PDF document text
    • https://cdn.sqhk.co/bebomopakax/1hhMQhe/74057066960.pdfIn PDF document text
    • http://vavazexowupex.medianewsonline.com/37818194265.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411229/normal_5fcc83051a007.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416326/normal_5ff7f265503d9.pdfIn PDF document text
    • http://stroiline74.ru/fopaluxatoba06lb.pdfIn PDF document text
    • https://bimejijanaki.weebly.com/uploads/1/3/5/9/135986904/folotef.pdfIn PDF document text
    • http://govuxojikasumot.scienceontheweb.net/putixutu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://movuzawizigevej.myartsonline.com/tanolajav.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_off0000f87a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF87A 4596 bytes
SHA-256: ffb5388ecd5742945040a9d5d752ac047e57bf177c85be85c0cf72f543b3a57a
font_01_sfnt_off0001083d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1083D 13772 bytes
SHA-256: 280c7b6853a32e99f6dc6323702479f4cf3c1b2f973e053a2900bf31ff2c8e82

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