Malicious PDF — malware analysis report

Static analysis result for SHA-256 9824d82050a593c7…

MALICIOUS

PDF

78.0 KB Created: 2021-02-05 01:05:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 96708f82cdab24f3fbe2355a69277e3a SHA-1: 120359a6761d5f74f3655317e1585d945b49ee8f SHA-256: 9824d82050a593c793b00c506ae0caf159277d0f9c9afba5d427e5c2033dc1fc
126 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including external URI redirection and ML classification. The presence of numerous links to disposable domains and the ClamAV detection strongly suggest a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to malicious sites, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://bologen.ru/123?utm_term=does+crabs+have+hearts PDF link annotation
    • http://nature-ital.space/happy_hanuman_jump_gamez4qny.pdfIn PDF document text
    • http://everydays.space/66626935871wpmqp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402951/normal_60065e5c31681.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390996/normal_600a0893217d3.pdfIn PDF document text
    • http://vannabanyavsedela.xyz/house_party_leah_guidemmp3m.pdfIn PDF document text
    • http://whitetwo.space/361302029901gq2h.pdfIn PDF document text
    • http://shlifovka-pol.website/73929505519b0q7b.pdfIn PDF document text
    • https://lomimasexoguxi.weebly.com/uploads/1/3/4/7/134736135/63841e78.pdfIn PDF document text
    • http://googsnat.space/padre_malachi_martinfj0tu.pdfIn PDF document text
    • http://3bki.ru/balboa_short_story_by_sabina_murrayh5ht3.pdfIn PDF document text
    • http://dirtygirl.fun/tesla_model_3_laden_bij_fastned9aeg5.pdfIn PDF document text
    • https://sevenunoxesu.weebly.com/uploads/1/3/4/3/134341304/32435f417.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368479/normal_5fdc64306b697.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501027/normal_5fddcfd46f12d.pdfIn PDF document text
    • http://prodive.su/rururavekjx91s.pdfIn PDF document text
    • http://leoidet.xyz/fizowivotejiwg45s.pdfIn PDF document text
    • http://hookup157.site/senha_de_wifi_da_igreja_sudbcv3p.pdfIn PDF document text
    • http://cybety.xyz/dakirerupenfs6s1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497348/normal_601c6ed4704fc.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
    • https://s3.amazonaws.com/jadere/cpr_guidelines_1980.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/wevanapiwerurudilak.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/guidelines_in_writing_citations.pdfIn PDF document text
    • https://s3.amazonaws.com/jazamerijekufol/apple_inc_business_strategy.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e769.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE769 4688 bytes
SHA-256: e7214a3594b590c3d01b654636dc19247973587808a738472401526be54ee96b
font_01_sfnt_off0000f76e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF76E 10812 bytes
SHA-256: 1e7633fba7181371420303db11986d32a0af05b7439830bad1701091abc911f8
font_02_sfnt_off00011c82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C82 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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