Malicious PDF — malware analysis report

Static analysis result for SHA-256 75bf888244843250…

MALICIOUS

PDF

135.1 KB Created: 2021-02-22 14:08:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 99137a0a6b5ea4ebc9d2a32239e6b0c0 SHA-1: 58fd66b5cd2d9fb55e18f7a306ca700d483353b4 SHA-256: 75bf8882448432500327f84b42ff32436f35bbeb71a743f9a695a3817e363cfb
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 0.9991

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://bologen.ru/aws?utm_term=honda+eu2000i+parts PDF link annotation
    • http://lirerigoteses.22web.org/algebra_and_trigonometry_7th_edition_sullivan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369626/normal_600ea0d82d9a9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365575/normal_5fca0aaece043.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422133/normal_5fe97ef968b79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384655/normal_601a9b47d6af6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369653/normal_5fe27ef15d4c0.pdfIn PDF document text
    • https://zajedipadere.weebly.com/uploads/1/3/1/3/131398131/zixenipusov.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://zefojebenodimu.rf.gd/nissan_armada_2009_owners_manual.pdfIn PDF document text
    • http://zobawukesilebaf.epizy.com/sedop.pdfIn PDF document text
    • http://nonidimujosapa.epizy.com/83309206049.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/waxenivemuvawasikimafafa.pdfIn PDF document text
    • http://magonusu.epizy.com/96562169855.pdfIn PDF document text
    • http://tipiwozametorol.epizy.com/lipimavovumisixawowiraxo.pdfIn PDF document text
    • http://gotuwutusefaw.epizy.com/52331813479.pdfIn PDF document text
    • http://webekilijonelew.epizy.com/15521788908.pdfIn PDF document text
    • http://wosunitiguzivef.epizy.com/basics_of_computer_engineering.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0001cec1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1CEC1 27388 bytes
SHA-256: 38da43a966fea4834bdc6208eca9f7fd145a3fb8eab041b7c786abc8e4431877
font_00_sfnt_off0001978e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1978E 5040 bytes
SHA-256: 9ae684f268c00a4d79bca8cd1681c54a9537863b1cf37366e78eefaacd222d15
font_01_sfnt_off0001a8b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A8B0 11056 bytes
SHA-256: 76aeaae2725c1c03a33cf4ba8b8e4d30e06260524f579bf56625d3a92b9dc382
font_03_sfnt_off0001ff69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FF69 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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