Malicious PDF — malware analysis report

Static analysis result for SHA-256 1daf0a99d12d354f…

MALICIOUS

PDF

64.6 KB Created: 2020-06-19 15:41:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: d12a62552bcbe30d4042c1946b24b781 SHA-1: 9b2a2efd9c44a117336cae8773690cf5bd9eedff SHA-256: 1daf0a99d12d354fb39115a31506d8b6ee1fb917d774fd1507d795f2eb5f9abb
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded external links, identified by the 'PDF_SEO_LINK_FARM' heuristic. These links point to various domains, suggesting a link farm or redirection scheme. The ML classifier also strongly flagged this PDF as malicious. The embedded content appears to be obfuscated, but the primary function seems to be directing users to external, potentially malicious, web resources.

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://bestrealestateagentinbatonrouge.com/uploads/1/3/2/7/132741099/132741099.html#hussain+bin+mansoor+hallaj+urdu+pdf PDF link annotation
    • http://jonahandsophiebnaimitzvah.com/uploads/1/3/0/7/130776374/topowama-lilizobefopolat-lawerefixixij.pdfIn PDF document text
    • http://burnoutgrowth.com/uploads/1/3/0/6/130605002/fajebipopekatas.pdfIn PDF document text
    • http://paids.info/uploads/1/3/0/5/130547340/tupuzezadu.pdfIn PDF document text
    • http://aerialcanvas.online/uploads/1/3/0/6/130621300/5878833.pdfIn PDF document text
    • http://greylockband.com/uploads/1/3/1/4/131408666/3416971.pdfIn PDF document text
    • http://hydrolactic.com/uploads/1/3/0/9/130969310/8765757.pdfIn PDF document text
    • http://wrebs.com/uploads/1/3/0/5/130542922/8774498.pdfIn PDF document text
    • http://madminds.org/uploads/1/3/1/6/131606055/pimolawapid.pdfIn PDF document text
    • http://arenius.systems/uploads/1/3/1/4/131438761/zobalivakir-fobukegowofo.pdfIn PDF document text
    • http://hokitikarugbyleague.com/uploads/1/3/1/4/131453527/domovagul_jojisugit_jodamape.pdfIn PDF document text
    • http://hostmaster.cravenvale.org.uk/uploads/1/3/0/9/130969235/c607685ecc.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
    • 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 6

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
stream_005_off0000d013.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xD013 22132 bytes
SHA-256: 201105f070aa74bc89a8fca150b1b2dc89b28ed18d24078b41ba856e3c8da369
font_00_sfnt_off000094dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94DD 5144 bytes
SHA-256: f0fa1264d811121bf0e307f2092ec3784519b02f01cfd6d81fc8c15e5bc4b342
font_01_sfnt_off0000a609.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA609 13732 bytes
SHA-256: 3db761b6176fd6cf98c8d14f932ce410fa65e6e1d8138829d554f5b215502dab

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