Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bea87774407cd4f…

MALICIOUS

PDF

93.7 KB Created: 2021-03-21 03:21:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 7f6108a532fde6c164751dce0e59936d SHA-1: 562a845aacc519be7638212b028d56756e578aa3 SHA-256: 8bea87774407cd4f30a1ed2bf4b9332ed19ff173a68c499e16affcccbe4a1b58
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9967

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 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://leonvi.ru/aws?utm_term=what+is+the+easiest+pattern+to+crochet PDF link annotation
    • http://freds.space/volkswagen_jetta_2012_owners_manualk2q4f.pdfIn PDF document text
    • http://mexicotop3.xyz/708486312678qdi0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481695/normal_5fe35aca01c51.pdfIn PDF document text
    • https://cdn.sqhk.co/tekuligote/igcFSib/life_of_a_mercenary_romance_vera.pdfIn PDF document text
    • https://cdn.sqhk.co/paxepilekot/gVgdih4/fitbit_sense_black_friday_deals.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501208/normal_60485f8aa7090.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409118/normal_6004717b6426b.pdfIn PDF document text
    • https://cdn.sqhk.co/fowipovoji/byWHiAL/rentable_carpet_cleaners_near_me.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377704/normal_5fefdce6843be.pdfIn PDF document text
    • http://latencfsrt.space/polisacaridos_de_reserva4bcd9.pdfIn PDF document text
    • http://organic100.fun/20778451660uljre.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417997/normal_5fd683233bcba.pdfIn PDF document text
    • http://investmag.org/52898229506aerw3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407562/normal_5fdaa90cb5d9d.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvonazavo/hjfidif/dragon_merge_wind_game.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465938/normal_5ff65ac91f9ca.pdfIn PDF document text
    • http://wordsideget.top/wizobumizurirurisokukunegbro0v.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448548/normal_601ee971e59d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367938/normal_602a3dcbea7ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404105/normal_605596ae18da3.pdfIn PDF document text
    • http://padlamadla.site/common_english_words_pronounced_wrongyyp5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368474/normal_603ff039cb385.pdfIn PDF document text
    • http://nyvelsets.online/88631583259qbue1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366395/normal_5fc9560027c3b.pdfIn PDF document text
    • https://cdn.sqhk.co/wirujurumugi/mKMlp7g/zalavolevigunavafa.pdfIn PDF document text
    • http://stroy-level.ru/game_booster_androidrrbxs.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00013292.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13292 5004 bytes
SHA-256: 19571ec231976baea26370a0363bd8d45f8eae218efd047ab9193169b8178ed5
font_01_sfnt_off0001439d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1439D 10928 bytes
SHA-256: daca0330ec3e54fc698068d2133aa169835a3e32bc42014b14c0e32d96a454f3

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