Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce2a88c8ff94d9fe…

MALICIOUS

PDF

70.5 KB Created: 2021-02-15 21:46:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e9478da67a6beb92255b30ca512c74ea SHA-1: 387f4a74c996a912f57e6584bd7566dda3504e0b SHA-256: ce2a88c8ff94d9fe8240fcc710338134703a1fbe577d12d0eab0e0da2e202c38
126 Risk Score

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 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/123?utm_term=twilight+breaking+dawn+part+2+full+movie+online+hd PDF link annotation
    • http://porn77.design/gowiwivs1w2r.pdfIn PDF document text
    • https://fojiwuduz.weebly.com/uploads/1/3/5/3/135309278/763304.pdfIn PDF document text
    • https://cdn.sqhk.co/xawefigi/aih3nHB/omni_notes_android.pdfIn PDF document text
    • http://wivejudotimog.22web.org/21832345660.pdfIn PDF document text
    • https://sitegevom.weebly.com/uploads/1/3/4/6/134664280/pekevoje.pdfIn PDF document text
    • https://welomutulek.weebly.com/uploads/1/3/4/8/134873792/sunimodoxi_lirex_mitin_vopibavene.pdfIn PDF document text
    • http://rimaloxal.22web.org/online_ios_emulator_no.pdfIn PDF document text
    • https://simebusuf.weebly.com/uploads/1/3/1/4/131406507/d79846c.pdfIn PDF document text
    • https://cdn.sqhk.co/sifalavuxozo/ccMgghe/rekofiwirajajasi.pdfIn PDF document text
    • https://lusenivusimutom.weebly.com/uploads/1/3/4/8/134887898/2261901.pdfIn PDF document text
    • https://gikesusemu.weebly.com/uploads/1/3/4/7/134775173/7009732.pdfIn PDF document text
    • http://academic-club.ru/ikea_kallax_4x4_manual52el7.pdfIn PDF document text
    • https://werevofapopaja.weebly.com/uploads/1/3/4/4/134492388/43a8c7c.pdfIn PDF document text
    • https://cdn.sqhk.co/mojupesonon/ahahgjg/hidden_picture_puzzle_games_free_online.pdfIn PDF document text
    • http://yoga-fitness.space/1641255624718xdq.pdfIn PDF document text
    • http://davavemoj.66ghz.com/64582710751.pdfIn PDF document text
    • https://nupimixek.weebly.com/uploads/1/3/2/7/132712066/nebunas.pdfIn PDF document text
    • https://jonomivebotuw.weebly.com/uploads/1/3/4/6/134683751/suwosixitel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://resaruxowepu.epizy.com/sifudi.pdfIn PDF document text
    • https://s3.amazonaws.com/tikoweravisixu/netherlands_date_time_format.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_off0000d1f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1F4 5716 bytes
SHA-256: ed7bf3d48b508f3fd2177864871e0877c7c3743fce49daba26d74396d6f34d7f
font_01_sfnt_off0000e54e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE54E 11700 bytes
SHA-256: a9801e187803df17ce2b97d8e0b1a9f4810e621f86e8f83f77d61819d66f785b

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