Malicious PDF — malware analysis report

Static analysis result for SHA-256 427459a1e4db0969…

MALICIOUS

PDF

72.2 KB Created: 2021-02-27 15:52:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 3172d7c13e530584ad2eed5dca133c3b SHA-1: 00cb987c97ebc277d1a7a89cc2a71502872009f8 SHA-256: 427459a1e4db0969087da74a86e3d6a808b7942a52a7962dd8a1de09f5ff1f57
134 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are hosted on disposable domains and utilize UTM parameters, indicating a link farm or phishing operation. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or a scam. The presence of embedded URLs and the 'Urgency / deadline lure' heuristic further support this, suggesting the document is designed to trick users into clicking malicious links.

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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/strik?utm_term=harbor+breeze+a25-tx005r+original+replacement+remote+control PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4415081/normal_5ff79bea286c8.pdfIn PDF document text
    • https://cdn.sqhk.co/leporolino/Xghjdhg/san_manuel_slot_games.pdfIn PDF document text
    • http://bomaduworofa.medianewsonline.com/25847592103.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447079/normal_601bc987d6114.pdfIn PDF document text
    • https://cdn.sqhk.co/zotipimesaza/feXggTP/ravupovirovojopuxi.pdfIn PDF document text
    • http://nutosuvitiraj.scienceontheweb.net/vivusa.pdfIn PDF document text
    • https://cdn.sqhk.co/vifejoneses/ieTlgi3/28785126263.pdfIn PDF document text
    • http://hookup682.site/garemavafamimib6pnm0.pdfIn PDF document text
    • http://fabermanufacture.ru/dotted_alphabet_font_freemnxuq.pdfIn PDF document text
    • http://kvyovk.xyz/75274016387oum00.pdfIn PDF document text
    • https://cdn.sqhk.co/buzunonoj/3Eshhgf/nick_carter_news_2020.pdfIn PDF document text
    • http://smcjd.com/ruboxosavasetubad7awe4.pdfIn PDF document text
    • http://raisinshq.club/gimolusogajujodusexiruzpyymy.pdfIn PDF document text
    • https://cdn.sqhk.co/tesosunimew/bCiigTo/febewegekaxebuwakofubajid.pdfIn PDF document text
    • http://xogunajeraxuda.mywebcommunity.org/1714035128.pdfIn PDF document text
    • http://memisada.mygamesonline.org/2010_chevy_malibu_power_steering_fluid.pdfIn PDF document text
    • http://remeik.ru/mejinigesuxekon4801.pdfIn PDF document text
    • http://itasda.online/videohive_vintage_music_opener_freeoitdw.pdfIn PDF document text
    • http://bigwin-1xbet.fun/astronomy_today_volume_1_the_solar_systemqxa3r.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ccf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCF2 5512 bytes
SHA-256: a35484fdda869481d8b73b1798b11fb9001b416ee26c77cc4f20adaa0d28b837
font_01_sfnt_off0000dfa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA7 11004 bytes
SHA-256: 7150a719a5a4242a12e7b775512e940972a5f0f693d1a798027db30adc122adf
font_02_sfnt_off00010512.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10512 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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