Malicious PDF — malware analysis report

Static analysis result for SHA-256 97ab6c98c92e4901…

MALICIOUS

PDF

76.1 KB Created: 2021-02-02 08:57:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: d57b7676777ef1663014d792150ab06d SHA-1: 9a9ec032ebdc3d6a5ed87aedcecf70462d596990 SHA-256: 97ab6c98c92e4901a0a3c83ee8eddea12f7958c8f8b5670f2f998518c6d02635
194 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, containing numerous external links, many of which point to disposable hosting services. The document body, though heavily obfuscated, appears to be related to movie downloads, suggesting a lure to entice users to click on malicious links. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://bologen.ru/123?utm_term=frozen+2+full+movie+download+mp3 PDF link annotation
    • https://kevonixoxudunu.weebly.com/uploads/1/3/0/7/130775897/4908681.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371495/normal_60130636d4851.pdfIn PDF document text
    • http://letxxnx.org/unity_crack_asset_store_freeswpu3.pdfIn PDF document text
    • https://suxapenogabako.weebly.com/uploads/1/3/4/6/134602080/jafimetu_kuxaga.pdfIn PDF document text
    • https://bidemujoniju.weebly.com/uploads/1/3/1/8/131856381/xevixekawokud_zexekajomenuw_zunawov_ruxuxuvorupixod.pdfIn PDF document text
    • https://minaraxu.weebly.com/uploads/1/3/4/7/134765114/tajota.pdfIn PDF document text
    • http://kutakelipaxeb.22web.org/22828532953.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417418/normal_5fe7ca671df50.pdfIn PDF document text
    • https://laniguxademe.weebly.com/uploads/1/3/1/4/131452878/xejasufasud-zufaxama-zokuxopi.pdfIn PDF document text
    • https://tutitobogin.weebly.com/uploads/1/3/4/4/134485970/2483790.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388819/normal_5fca990f3e7bb.pdfIn PDF document text
    • http://sberbank.services/nadan_pattukal_malayalam_mp3_free_download33br2.pdfIn PDF document text
    • http://mukesuzovuvo.22web.org/44868351312.pdfIn PDF document text
    • http://sedopusomivul.22web.org/free_investor_pitch_deck_templates.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wamesugome.rf.gd/rujirozorufilusenanevowim.pdfIn PDF document text
    • http://tanozetodane.rf.gd/raxupide.pdfIn PDF document text
    • http://pugagewuda.rf.gd/29720365814.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_off0000ed58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED58 5464 bytes
SHA-256: 22b9cf254f52a700cdfd1e5b5d7bc61c685672e8e82a67eed8154cac25f498bb
font_01_sfnt_off00010003.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10003 10204 bytes
SHA-256: 0e725f23bdccd098238e0ebdbd0118e4d71de43386ec9184abe9d703a03adff0

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