Malicious PDF — malware analysis report

Static analysis result for SHA-256 7825b957533f10cc…

MALICIOUS

PDF

88.5 KB Created: 2021-02-26 18:45:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4498fb231b38770dc88ec8473f0df779 SHA-1: 66acf95231e2fffec4881bc9bd695141825e4d6b SHA-256: 7825b957533f10cc2263535f66995787564a4bb591277326caf5c5bc138c7def
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 0.9997

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://lozipotod.ru/strik?utm_term=how+much+is+after+effects+cc+2020 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4384152/normal_5feff7d348865.pdfIn PDF document text
    • http://nibelv.xyz/58964390777hnwak.pdfIn PDF document text
    • https://gemajoxow.weebly.com/uploads/1/3/4/7/134721961/5075408.pdfIn PDF document text
    • http://nout-prokat.website/82727595254b9z9e.pdfIn PDF document text
    • https://kawolusasemosu.weebly.com/uploads/1/3/5/3/135397741/bogetekasota.pdfIn PDF document text
    • https://nilijinaxobizag.weebly.com/uploads/1/3/4/3/134356504/kaxuwekit.pdfIn PDF document text
    • https://xixozikitep.weebly.com/uploads/1/3/4/0/134097223/zejipefuxe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454559/normal_5ff67391638e5.pdfIn PDF document text
    • https://kagepumesafoke.weebly.com/uploads/1/3/4/8/134846889/5950362.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366364/normal_5fe83b830dee9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369922/normal_5fe3b33d2a4a2.pdfIn PDF document text
    • https://livaganomin.weebly.com/uploads/1/3/4/3/134399079/vupidokejol.pdfIn PDF document text
    • https://cdn.sqhk.co/teduwugevoki/gfdYjco/ninja_foodi_air_fryer_oven_cyber_monday.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://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_off00011013.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11013 5192 bytes
SHA-256: 036fc2ed3269a41f810ac6a282aec6f07b45bc6f23734b140bf2698be5bb8aca
font_01_sfnt_off000121c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121C8 10920 bytes
SHA-256: 0f8776b88a40b88f2a58f091303a6cb80a7b5f57a82798809d531ab2427add70
font_02_sfnt_off000146da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146DA 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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