Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9329fefa80ddf64…

MALICIOUS

PDF

80.0 KB Created: 2021-04-04 08:12:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a49d00ac6ce776c7aa902fd4900244c9 SHA-1: e98e828e38e77db6fd9f0db639f27e72bcbcf81a SHA-256: a9329fefa80ddf641f55e70b86ba3b68bf880b1920ae9d4382cb67d1458cdca8
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/award?keyword=metagenics+ketogenic+diet+pdf PDF link annotation
    • https://mututekabifu.weebly.com/uploads/1/3/4/4/134466573/laromijefewikuzurubi.pdfIn PDF document text
    • https://woxumonukoke.weebly.com/uploads/1/3/6/0/136090180/eeb0f01b9e0e113.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450042/normal_604459c545b5f.pdfIn PDF document text
    • https://cdn.sqhk.co/jamasedese/ZidigKS/80719647720.pdfIn PDF document text
    • http://mandarins.space/sigefj257x.pdfIn PDF document text
    • http://naturfresh.space/standard_queen_bed_sheet_measurementsmn9sc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420600/normal_604f985fbf73c.pdfIn PDF document text
    • https://ripumoravoramex.weebly.com/uploads/1/3/1/6/131606135/933ed004c.pdfIn PDF document text
    • http://ketrovk.xyz/cardboard_pirate_boat_templatemh9vy.pdfIn PDF document text
    • https://dexewagumaz.weebly.com/uploads/1/3/1/4/131438443/26341cf.pdfIn PDF document text
    • https://cdn.sqhk.co/rasepotobami/fbtwMhd/torn_rotator_cuff_exercises_to_avoid.pdfIn PDF document text
    • http://lalashoppen.online/the_rhythm_of_life_matthew_kelly_reviewbdn3c.pdfIn PDF document text
    • http://mstmail.space/visqueen_vapour_barrier_data_sheetn0lrl.pdfIn PDF document text
    • http://goldstein.berlin/15662846693r1g2g.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488555/normal_6033316655580.pdfIn PDF document text
    • https://tupisefam.weebly.com/uploads/1/3/1/3/131383837/nemawexezuzotikas.pdfIn PDF document text
    • https://wawanuxofidote.weebly.com/uploads/1/3/0/7/130775818/7425416.pdfIn PDF document text
    • http://remontnatali.ru/1128215398ty2on.pdfIn PDF document text
    • https://cdn.sqhk.co/godezixibufo/9ZjjxdC/beautiful_flower_wallpaper_full_hd_download.pdfIn PDF document text
    • http://reduslimitalia.site/how_to_connect_wireless_n_range_extendern7fx6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369509/normal_5ff4bb949d3b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488822/normal_60622200ce2d8.pdfIn PDF document text
    • https://tazusovekofuwaj.weebly.com/uploads/1/3/5/9/135969448/c48f829169276.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f94e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF94E 5264 bytes
SHA-256: d6dcfe2e3568a96d6b67d914d7f62797230dc8ce7f0d7d6bb6da28ce323bf988
font_01_sfnt_off00010b62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B62 11148 bytes
SHA-256: 83fa22738fb49b6dcda17ab19d4f2dc047d2d98719daa77b75618be0c062e1a3

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