Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bf700914bed55c7…

MALICIOUS

PDF

83.0 KB Created: 2021-03-28 16:17:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b2aefd4a9fe1a678d9459c37751e2b1c SHA-1: 8a0fd1ac65f82501caefeda1e2bf5439ea056ace SHA-256: 9bf700914bed55c7fd603d694cff1650a6e5fa85bcd34d4563d4d65d7784119f
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 0.9994

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://zajinet.ru/wix?keyword=swann+floodlight+security+camera+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388424/normal_6044915e1d197.pdfIn PDF document text
    • http://magnitoli-2ekran.site/pet_bengali_word_meaning_of_theirwk457.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374963/normal_6034944e7b82d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412895/normal_6002bf5738d7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365624/normal_6009de4781ef4.pdfIn PDF document text
    • http://timecodes.net/lasko_fh500_fan__space_heater_combo_tower_42_inch_white0k8ln.pdfIn PDF document text
    • http://agent-ritual495.online/vampire_diaries_books_or_tv_show_bettertg08p.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455179/normal_60603c14b33ae.pdfIn PDF document text
    • http://com-signto5.xyz/1263586958g9lic.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459163/normal_6027af7da4483.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468812/normal_6005b555d3dcc.pdfIn PDF document text
    • http://revershjtb.site/federalist_paper_78_questions_and_answerskex7q.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465400/normal_602a7b8fb024e.pdfIn PDF document text
    • http://winoraama.website/502808434848776v.pdfIn PDF document text
    • http://nigasheff.xyz/ncaa_basketball_champion_ringspjhxf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vipuxafol/loctite_641_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/mijugobutazigadopuf.pdfIn PDF document text
    • https://s3.amazonaws.com/ninasivol/14768680135.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cb6b064-fa22-44c0-b26d-e709395b02ec/vumakakudoro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1131418-96d3-4b66-bd10-0acc0cda0f96/11312928446.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d9d8fa5-ffa7-415f-b4d9-6a2d02cf7ee1/mexazalumutekudati.pdfIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/google_chrome_os_for_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb639469-3ae7-4c94-856e-0ce4a2b59e91/girabifetizize.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_off00010554.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10554 5732 bytes
SHA-256: 729c26c03d5ef7a6dbd9299a1404213bb7ddad900ee1d80e3b30488d2e00836d
font_01_sfnt_off000118cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118CC 11028 bytes
SHA-256: eb25b6b40f77c51703ba8653dc44e93a32ffdb232dbc2b507bd5bfadc16181af

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