Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b313a6fa9f34d78…

MALICIOUS

PDF

79.2 KB Created: 2021-03-04 10:43:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 6fa05faa6bd68cf20bc706fe698c25e4 SHA-1: 9e9fccf4cbafa4b9ed869318c2c78e46887eff4d SHA-256: 7b313a6fa9f34d7801c6e777b315935bcf8be4b65eb6d1edf05a459eec8d3dc2
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 0.9996

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://mezovuduw.ru/wix?keyword=panasonic+viera+tv+manual+2009 PDF link annotation
    • http://sifinujox.sportsontheweb.net/why_isnt_my_kitchenaid_dishwasher_drying.pdfIn PDF document text
    • https://pemolodubi.weebly.com/uploads/1/3/6/0/136052155/kirowapasaw.pdfIn PDF document text
    • http://poxumanavofeboz.scienceontheweb.net/samsung_nu7100_49_price_philippines.pdfIn PDF document text
    • http://jarewitof.mypressonline.com/99390327943.pdfIn PDF document text
    • https://wavuzujez.weebly.com/uploads/1/3/1/4/131406867/0e1f539766.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410211/normal_5fe2ea5cc2443.pdfIn PDF document text
    • http://taxilozevuj.iblogger.org/author_s_purpose_worksheets_middle_school.pdfIn PDF document text
    • https://ziriponu.weebly.com/uploads/1/3/2/6/132696112/61a7b3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416150/normal_602a7a0b3473e.pdfIn PDF document text
    • http://kuzexamipapoxip.medianewsonline.com/82839529361.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485823/normal_5fe6f73d2247c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444874/normal_6013240d15d33.pdfIn PDF document text
    • https://xunilizavokuniz.weebly.com/uploads/1/3/6/0/136050149/295613.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://tokozod.myartsonline.com/rubovexudab.pdfIn PDF document text
    • http://sakogabutal.onlinewebshop.net/38238552051.pdfIn PDF document text
    • http://tumunem.epizy.com/calories_in_dominos_small_cheese_burst_pizza.pdfIn PDF document text
    • http://dasobiviwadodaj.atwebpages.com/gilidemoxuteponakusowifo.pdfIn PDF document text
    • http://zejibanunepi.myartsonline.com/robert_kiyosaki_childrens_book.pdfIn PDF document text
    • http://xigesema.epizy.com/fipekubolusikedaxomonon.pdfIn PDF document text
    • http://jesowafifu.rf.gd/45593024533.pdfIn PDF document text
    • http://pazipinabobon.epizy.com/88097154769.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e25a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE25A 5316 bytes
SHA-256: 7b7047938acbe88c599c66c74501718b0303305a580503d1c8ebbafc716830ea
font_01_sfnt_off0000f450.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF450 13784 bytes
SHA-256: bb885ac0ed7fdfd4b735da9f405d20278eb4897f8984d41c878d0928e8bc4925
font_02_sfnt_off00011f52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F52 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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