Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f5c270559e72164…

MALICIOUS

PDF

37.9 KB Created: 2020-05-13 02:43:58 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f9d3c0f707050a2fc22e519b6911e45c SHA-1: f51c478112ee135edb150e9e392f05218f8de5cb SHA-256: 9f5c270559e721641dc48dae31ba8a3ef30fe883081fed76e5488b25d9a30084
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document was flagged by a machine learning classifier with high confidence as malicious. It contains a large number of external links, indicating a link farm or redirection scheme designed to lead users to potentially harmful websites. The presence of numerous PDF links, many with numeric or slug-based slugs, suggests an attempt to manipulate search engine results or distribute various malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://trackfactory.net/uploads/1/3/1/8/131857474/131857474.html#annual+leave+application+letter+pdf
    • http://sakhalinnaturetours.com/uploads/1/3/0/5/130540583/1894b6a3ebc689.pdf
    • http://mydreameyes.com/uploads/1/3/0/4/130476454/695cb253ed.pdf
    • http://thinkingreversemortgage.com/uploads/1/3/0/6/130639764/lizepomedivavotexi.pdf
    • http://kicksforcancerevents.org/uploads/1/3/1/4/131452987/8223743.pdf
    • http://tiffanyaeck.com/uploads/1/3/0/6/130639949/xadixulagigon-fixovibe.pdf
    • http://northwestgeorgia.org/uploads/1/3/1/8/131872138/3867877.pdf
    • http://kellydcook.com/uploads/1/3/1/3/131380470/61cc1a14d6e3e5.pdf
    • http://tccpet.org/uploads/1/3/0/9/130969577/xunomo_baleveful_zimufala.pdf
    • http://preciseestimating.org/uploads/1/3/0/8/130873740/lepibetenejamer_tanuwas.pdf
    • http://mosaico.ch/uploads/1/3/0/6/130621283/rogat-rukum-gekenotukigonu-lavesopokemuwu.pdf
    • http://emmajamesboutique.shop/uploads/1/3/0/9/130969419/ad873250e051.pdf
    • http://ohiolaserspa.com/uploads/1/3/1/1/131164210/3acd6c87.pdf
    • http://musictheoryworksheet.com/uploads/1/3/1/4/131437484/foxijetupufezemow.pdf
    • http://classytattoogirl.com/uploads/1/3/0/7/130738988/a78473659d.pdf
    • http://elizabethsgrandantiquecompany.com/uploads/1/3/1/3/131380616/0ad67cbb61c.pdf
    • http://musictheoryworksheet.com/uploads
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006971.bin
3f43ee6f4afba8a2029782d8a9ed4110ac2faebb73cfd1b95ac9a0e3e3013286		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6971 10100 bytes

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