Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e5f2d1b3bae6357…

MALICIOUS

PDF

44.4 KB Created: 2020-03-17 08:24:56 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 7232720ac0cdb97500b1abc5b2d55140 SHA-1: c0d5ba772e98baaa03833e3b4bf9ba4d9c72ce84 SHA-256: 7e5f2d1b3bae635730d7fb165609beeef173414bb7fbe666e2d7ad78e1b740a0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a dropper. The document contains a large number of external links pointing to PDF files on various domains, suggesting a link farm or a method to distribute further payloads. The embedded URLs and the structure indicate an attempt to redirect users to potentially malicious content hosted on these external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • ClamAV: Pdf.Dropper.Agent-8019252-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-8019252-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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 http://thedogbedcompany.net/uploads/1/3/0/7/130738799/130738799.html#best+career+for+entp+reddit PDF link annotation
    • http://techtronicmobile.com/uploads/1/3/0/4/130476429/dac9b.pdfIn PDF document text
    • http://chocny.com/uploads/1/3/0/5/130551249/sesufamuxozudoxez.pdfIn PDF document text
    • http://eventled.org/uploads/1/3/0/4/130483138/0c5d90.pdfIn PDF document text
    • http://nexgentest.com/uploads/1/3/0/5/130588605/38a2522c01495ab.pdfIn PDF document text
    • http://bayareaboatandhomeloans.com/uploads/1/3/0/4/130483400/b8fb7fc126594f0.pdfIn PDF document text
    • http://imyanmaradv.com/uploads/1/3/0/2/130288507/xabevet-nolesozujalubok.pdfIn PDF document text
    • http://yologirlstucson.com/uploads/1/3/0/5/130541208/7230823.pdfIn PDF document text
    • http://danzdleon.org/uploads/1/3/0/5/130538939/2581712.pdfIn PDF document text
    • http://www.danapowellenergy.com/uploads/1/3/0/4/130477663/nadarumaxixifuzisune.pdfIn PDF document text
    • http://novelstar.net/uploads/1/3/0/8/130814208/5336651.pdfIn PDF document text
    • http://javierstreecare.com/uploads/1/3/0/4/130479472/1135725.pdfIn PDF document text
    • http://timebtime.com/uploads/1/3/0/7/130775440/8318944.pdfIn PDF document text
    • http://webmail.nikkialexanderphotos.com/uploads/1/3/0/7/130739274/9102937.pdfIn PDF document text
    • http://www.nubianstriders.com/uploads/1/3/0/9/130969653/48c35a86a4f2.pdfIn PDF document text
    • http://pearlporch.com/uploads/1/3/0/6/130604320/3929345.pdfIn PDF document text
    • http://splinteredmindshirts.com/uploads/1/3/0/7/130738949/59267.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007b91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B91 7580 bytes
SHA-256: 5a677c92ca88f03f3d63b8281f7e7fafc8b1ef6addcc22f36bdb25d4225e763d
font_01_sfnt_off00009911.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9911 2652 bytes
SHA-256: e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea

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