Malicious PDF — malware analysis report

Static analysis result for SHA-256 8434ddafab156b91…

MALICIOUS

PDF

75.1 KB Created: 2021-06-08 21:06:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 107e99c2529f8dd86f9b6357f2244312 SHA-1: df0d2e7735ec081b2985a61d2f25f8a42b0e8e90 SHA-256: 8434ddafab156b91a132be7676292ddea6da1d5f50657ee895dfac442cf95661
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 0.9998

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://laborke.ru/pbw?utm_term=wifi+hacker+software+for+pc PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4483851/normal_6011715c0b8e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474465/normal_604473b3e5c39.pdfIn PDF document text
    • https://batozovij.weebly.com/uploads/1/3/1/4/131455337/767125.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391896/normal_604989220d8dc.pdfIn PDF document text
    • https://sikukaposarimi.weebly.com/uploads/1/3/5/3/135307882/b713d537e60.pdfIn PDF document text
    • https://butabapob.weebly.com/uploads/1/3/4/7/134744569/gonufitasa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373755/normal_606225405766f.pdfIn PDF document text
    • https://gagivoxiw.weebly.com/uploads/1/3/5/9/135991060/zuravuxofanubex_detow_fevel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490274/normal_5fda630c73015.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4465565/normal_60b698a845d5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458122/normal_605ae3ceb4803.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4383160/normal_60b28fa4e72bb.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
    • http://bowawesup.pbworks.com/w/file/fetch/144565524/are_nike_sfb_gen_2_authorized.pdfIn PDF document text
    • http://jumedew.pbworks.com/w/file/fetch/144712848/geometry_dash_how_to_unlock_all_robots_2.1.pdfIn PDF document text
    • http://rijunepupuja.pbworks.com/w/file/fetch/144562944/taribinaji.pdfIn PDF document text
    • http://mapaduzipi.pbworks.com/f/vupax.pdfIn PDF document text
    • http://lifevuve.pbworks.com/w/file/fetch/144697014/93654453705.pdfIn PDF document text
    • http://fixulirulafa.pbworks.com/w/file/fetch/144527466/dc_legends_of_tomorrow_season_5_episode_1_crisis_on_infinite_earths.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCFF 4924 bytes
SHA-256: dba1f736e659eb2b2dbad9c1e29b734fb066add4047cc8ec5b4318a7cc954af9
font_01_sfnt_off0000ede2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE2 10224 bytes
SHA-256: b8bd3f42be016e74b4263148e6ea0f868abc1dc955c87e36c061d70ef13ad9bf
font_02_sfnt_off000110e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110E1 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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