Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3b9ee8d85383963…

MALICIOUS

PDF

82.3 KB Created: 2021-04-06 04:18:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 9a95f7cffaf1066d616f8a1c128ae9d7 SHA-1: 512d08e19dd4d9e9a44012cddd8c3bd32d579590 SHA-256: f3b9ee8d85383963a922fd07341b9c7aab27dbafb70580057217ed086d3b1a49
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 0.9995

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://zajinet.ru/award?keyword=ignou+b.+ed+entrance+question+paper+2020+pdf PDF link annotation
    • http://jabudapitu.scienceontheweb.net/cardiotonicos_digitalicos.pdfIn PDF document text
    • https://revogofoti.weebly.com/uploads/1/3/3/9/133999152/1305553.pdfIn PDF document text
    • https://damasidegiked.weebly.com/uploads/1/3/1/4/131411688/juruleku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419857/normal_60469a514889d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392864/normal_5ffa10c47caeb.pdfIn PDF document text
    • https://zefojakafi.weebly.com/uploads/1/3/0/7/130776787/675a5f43f60a87.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466398/normal_600190c8a54be.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379612/normal_6003b00b01c28.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421970/normal_6008c0d0cfa2e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446635/normal_5fdefd2fc1960.pdfIn PDF document text
    • http://zibikudupe.mywebcommunity.org/complete_pet_cambridge.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485693/normal_5fe95d3b80d4f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387703/normal_5ffcddd43d408.pdfIn PDF document text
    • http://nelilovodik.scienceontheweb.net/how_much_can_a_dodge_ram_ecodiesel_tow.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lekowezitodog.rf.gd/53425521374.pdfIn PDF document text
    • http://wulixojapekapa.epizy.com/veg_lasagne_sheets_recipe.pdfIn PDF document text
    • http://ramapenutizawa.epizy.com/milutapaborovovalisa.pdfIn PDF document text
    • http://potubavaziripek.epizy.com/55392105866.pdfIn PDF document text
    • http://fuguzametekobo.myartsonline.com/14012095185.pdfIn PDF document text
    • http://tososite.onlinewebshop.net/tazezurobibazaf.pdfIn PDF document text
    • http://rozevilamires.rf.gd/87538668559.pdfIn PDF document text
    • http://nigezedebojiwe.rf.gd/is_bombay_stock_market_open_today.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
stream_004_off0001287d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1287D 5104 bytes
SHA-256: ea7ec8ed42f5e9f4db6076ef6349e48b1e8d0138a5dc2e8af6107a15f2de3629
font_00_sfnt_off0000ef83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF83 5800 bytes
SHA-256: 85a5817a3dd91276931a9721253fb3f78bd30fb3c361195c5f8188b4f00b3dff
font_01_sfnt_off0001034c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1034C 10844 bytes
SHA-256: 431eb7693079189e45a0860b6087255793204ebff2655681127e5c01d844d568

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