Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0eeb9af0d776ed0…

MALICIOUS

PDF

67.1 KB Created: 2021-02-24 16:48:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c7aaa7283ae655451d4019551cc960e5 SHA-1: 9a83c7a548566c13040fad9d75dbed3a8e078d98 SHA-256: b0eeb9af0d776ed07fecee941d7c66627d10c22d1a4d6cd077d1371bbb1abf56
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://leonvi.ru/strik?utm_term=the+boy+in+the+striped+pajamas+final+test+pdf PDF link annotation
    • https://wewiruvikaju.weebly.com/uploads/1/3/0/7/130775929/359611.pdfIn PDF document text
    • https://labelamujevodit.weebly.com/uploads/1/3/1/6/131606697/5197343.pdfIn PDF document text
    • https://cdn.sqhk.co/sobilowibid/hbihuii/lego_batman_2_dc_super_heroes_android_walkthrough.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368487/normal_5fdd42591f535.pdfIn PDF document text
    • https://cdn.sqhk.co/jilijibimi/bigBFya/wosokolexotek.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447467/normal_6007507b2dd2c.pdfIn PDF document text
    • https://cdn.sqhk.co/kelanadu/Bjfjbot/kesaba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453102/normal_60154e5d70a62.pdfIn PDF document text
    • https://sisuwupuwadigif.weebly.com/uploads/1/3/1/4/131437471/3a38413.pdfIn PDF document text
    • https://nixujukasal.weebly.com/uploads/1/3/1/6/131636737/xagisopojix.pdfIn PDF document text
    • https://cdn.sqhk.co/numavagoko/hjjcjjq/2865510397.pdfIn PDF document text
    • http://jorowijedo.mywebcommunity.org/fluke_networks_pro3000_probe_user_guide.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tusepubenawipad.rf.gd/conformational_isomer_of_cyclopropane.pdfIn PDF document text
    • https://s3.amazonaws.com/padanivozeb/convened_crossword_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/wurivuve/70747025825.pdfIn PDF document text
    • https://s3.amazonaws.com/nodetuxapabara/sabamofipedilemasuzibuxug.pdfIn PDF document text
    • http://sizuzupapefapo.epizy.com/free_upc_barcode_generator_software_s.pdfIn PDF document text
    • https://s3.amazonaws.com/wovisak/guidepost_solutions_colombia.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_off0000c952.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC952 5548 bytes
SHA-256: 411f3c48de53e424f972444bd8ecbd3fee892f5e4ff12acd6fa0565258ce8607
font_01_sfnt_off0000dc08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC08 10220 bytes
SHA-256: 56987c010b5dac2d3d5c156159ce14f33c0cea6b485ab79ddf8d271a97a6fe31

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