Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b95f0b4e135760f…

MALICIOUS

PDF

65.9 KB Created: 2020-11-23 02:10:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 274e3450756e7720f6cfea9c1914745e SHA-1: 969f21993a0a836879d47557e8516deab1e50a86 SHA-256: 0b95f0b4e135760f932e0207a75e30b3400a75456fb0fb2f13e8a7c03660fe4f
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-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://trafffi.ru/123?utm_term=nova+launcher+prime+apk+fullprogramlar PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383327/normal_5f90b40b0a471.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501645/normal_5fad252ccb3fd.pdfIn PDF document text
    • https://kusipujetaz.weebly.com/uploads/1/3/4/4/134462876/tulapajeraloguriwe.pdfIn PDF document text
    • https://wedezetepeb.weebly.com/uploads/1/3/4/5/134528952/5952572.pdfIn PDF document text
    • https://zigegawemofeza.weebly.com/uploads/1/3/1/4/131406932/vipar.pdfIn PDF document text
    • https://sijoxedewi.weebly.com/uploads/1/3/4/3/134346210/c9dc9eaa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366377/normal_5f92839007c06.pdfIn PDF document text
    • https://fiwatinizajof.weebly.com/uploads/1/3/0/8/130874156/78dfd25.pdfIn PDF document text
    • https://lesofetu.weebly.com/uploads/1/3/1/3/131378838/5744658.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464739/normal_5fa725f59030a.pdfIn PDF document text
    • https://besiwalufeg.weebly.com/uploads/1/3/2/6/132696214/tivuloto.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/33d49139-316e-49dd-860e-659056489f31/fikeweluxipom.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/limupapiwokupanesiruwa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9594ef6-83dd-40cb-bfbe-3aba24023b38/ridakunevolev.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_off0000c2e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2E4 5344 bytes
SHA-256: 41933ac596973d38c96976a25be128a3b363fa50e3676a9cdac9055cc4bd1ad5
font_01_sfnt_off0000d4fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4FA 11932 bytes
SHA-256: fbf8542f380fa8162c169cca730bb29c3abe58caedce7eeaacf990cfca0b1688

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