Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ee5eb3b3ed26746…

MALICIOUS

PDF

30.8 KB Created: 2020-05-18 14:30:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-15
MD5: 074288132687ce253120c84a5ad7bc86 SHA-1: 0250f1b05dbb7b9e47d0fe0b1a47997e912b121b SHA-256: 3ee5eb3b3ed267465adbffa42378be7b7e40f9eb51a4d106073af41b907842f1
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body also contains embedded URLs, including http://the-whole-thing.com/uploads/1/3/1/3/131382486/131382486.html#nvidia+dds+plugin. This suggests the primary purpose is to redirect users to potentially malicious websites, likely for SEO spam or to host further malware. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://the-whole-thing.com/uploads/1/3/1/3/131382486/131382486.html#nvidia+dds+plugin PDF link annotation
    • http://thinkskookum.com/uploads/1/3/0/7/130776102/dodatobewuvag.pdfIn PDF document text
    • http://mygirlfriendshouse.net/uploads/1/3/0/3/130379135/6163177.pdfIn PDF document text
    • http://theatrestudentunion.com/uploads/1/3/0/4/130488365/xolusuku.pdfIn PDF document text
    • http://mysunshinedistributors.com/uploads/1/3/0/6/130620822/rurafivu_pipevuzifaxim_zotenesa.pdfIn PDF document text
    • http://tutoressex.com/uploads/1/3/0/5/130588710/727c3b5.pdfIn PDF document text
    • http://techcongo.com/uploads/1/3/0/6/130639152/jebokav.pdfIn PDF document text
    • http://hornerroofing.com/uploads/1/3/0/5/130588502/kezasamaf.pdfIn PDF document text
    • http://perrysburgrentals.com/uploads/1/3/1/1/131163533/00fbcf0ee7.pdfIn PDF document text
    • http://theblondefro.com/uploads/1/3/0/4/130483325/ff3185d98a.pdfIn PDF document text
    • http://thematthewaffair.com/uploads/1/3/0/6/130622002/2091b18c8bab22.pdfIn PDF document text
    • http://chloelorand.com/uploads/1/3/0/6/130604467/towisoxozoremalarun.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://scripts.sil.org/OFLIn PDF document text

Related samples 1

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

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004da5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4DA5 10544 bytes
SHA-256: e3d388fc82d98e14bb30f2e24f7efbcfc4d262d7363404f46aa0f335e979d2b2

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