Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6524a9018d1ea7e…

MALICIOUS

PDF

34.6 KB Created: 2020-05-18 20:10:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 46b48fff446b315998d7a79b568f668e SHA-1: 7d3335aa1a081f1aa585b342e15def707c5256df SHA-256: a6524a9018d1ea7e8af3c2fd9e520a2f077cd8c9879217d958e63380128c40d6
96 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection scheme. The document body, though partially corrupted, includes text related to marketing strategy and competitive positioning, which may serve as a lure. No scripts were extracted from this sample, but the sheer volume of external links points towards a malicious intent to direct users to potentially harmful content or for SEO manipulation.

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://followalongflexibility.com/uploads/1/3/0/2/130274263/130274263.html#marketing+strategy+and+competitive+positioning PDF link annotation
    • http://untdnatives.com/uploads/1/3/0/3/130379411/taxesekajakuwos_pifimogiwasise_biludiwefegi.pdfIn PDF document text
    • http://coverscope.com/uploads/1/3/1/4/131407312/genosekunizun-mitefeg.pdfIn PDF document text
    • http://hinghamsnowplowing.com/uploads/1/3/1/4/131453577/pojapepaboxesili.pdfIn PDF document text
    • http://bluecarnetwork.com/uploads/1/3/0/2/130272477/zajopajipamurivule.pdfIn PDF document text
    • http://dronetrout.com/uploads/1/3/0/9/130969746/b4de236.pdfIn PDF document text
    • http://ndorchids.com/uploads/1/3/0/4/130478935/solobog-jisalopobave-konobexufudi-teliri.pdfIn PDF document text
    • http://authortiffanyaleman.com/uploads/1/3/0/7/130775750/fibimiwodatol_zoparawapi_duwapuv_wajor.pdfIn PDF document text
    • http://sudburylaurels.ca/uploads/1/3/0/9/130969923/nijobefe-vaxefupib-bukijikami.pdfIn PDF document text
    • http://bckprograms.org/uploads/1/3/0/7/130775151/bubipunavomo.pdfIn PDF document text
    • http://noycenortheast.org/uploads/1/3/1/6/131607022/gexuw.pdfIn PDF document text
    • http://ribbarg.com/uploads/1/3/1/1/131163783/zosuwixawisu-rijitex-mupudezujunejes.pdfIn PDF document text
    • http://lymitlesshealth.com/uploads/1/3/0/6/130603760/kobomepaboluvob-pimogano-nulitive-jiten.pdfIn PDF document text
    • http://zenwich.co/uploads/1/3/0/2/130272415/papuboxase.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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E89 9488 bytes
SHA-256: e6b3da504c88ee4fb97d42a7a4bf45d87c39b0407339a74d34fd5142127a9adf