Malicious PDF — malware analysis report

Static analysis result for SHA-256 db407a298f75cd90…

MALICIOUS

PDF

39.5 KB Created: 2020-04-01 18:23:33 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-08-25
MD5: 01c31dde87c32dab6fc1c32cf8843b9e SHA-1: 80dde55a344ecde49d1758aa4472426d92fc363a SHA-256: db407a298f75cd90f11f24cfc5874a78dd68dec66a4aed153af037028db5bc5d
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, a technique often used for SEO manipulation or to distribute further malicious content. The ML classifier strongly indicated maliciousness. The document body text is minimal and appears to be metadata or boilerplate, offering little insight into a specific lure. No scripts were extracted from this sample.

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://kissakirja.fi/uploads/1/3/0/6/130621075/130621075.html#ejemplos+de+medios+alternativos+de+comunicacion+en+argentina PDF link annotation
    • http://appliedchiropracticoftroy.com/uploads/1/3/0/5/130588798/de2ec5.pdfIn PDF document text
    • http://sustainshelby.com/uploads/1/3/0/6/130603842/bukowafobisax_kudonojeribaxiz_fakujujofozu.pdfIn PDF document text
    • http://lubbockcarpetworld.com/uploads/1/3/0/4/130436244/jomezurosu_rukokab_zasos_dejupemo.pdfIn PDF document text
    • http://vinliu.com/uploads/1/3/0/3/130323588/kelomiropawawofazewe.pdfIn PDF document text
    • http://yourstrulyerikab.com/uploads/1/3/0/7/130740069/misetiwuwitajot_nijafu_jedarut_vodovabunoso.pdfIn PDF document text
    • http://publicworksservices.com/uploads/1/3/1/1/131164297/d78351f723b68.pdfIn PDF document text
    • http://gypsydenisse.com/uploads/1/3/0/2/130289392/gibelokerutimigabo.pdfIn PDF document text
    • http://lettermanjacketsutah.com/uploads/1/3/0/8/130813799/degavudububaginuxu.pdfIn PDF document text
    • http://supeshoppers.com/uploads/1/3/0/7/130776413/d3dbb6e82d1.pdfIn PDF document text
    • http://imaginggrace.com/uploads/1/3/0/8/130815213/pikipolipu-fubekisivap-runifaxuk-zotigimuxuzede.pdfIn PDF document text
    • http://doctorsandrarankin.com/uploads/1/3/1/4/131438776/321579.pdfIn PDF document text
    • http://sbranchconsultants.com/uploads/1/3/0/7/130775013/1570538.pdfIn PDF document text
    • http://pressurewashingtorrance.com/uploads/1/3/0/7/130776393/bivupe.pdfIn PDF document text
    • http://wchahillclimb.com/uploads/1/3/0/7/130775046/rujaf.pdfIn PDF document text
    • http://mail.pinegroveumc.com/uploads/1/3/1/3/131382590/4202586.pdfIn PDF document text
    • http://juarezanabel.com/uploads/1/3/1/0/131070167/57935.pdfIn PDF document text
    • http://imaraeats.com/uploads/1/3/0/7/130739806/sujoxesolonabi.pdfIn PDF document text
    • http://hotpawsboardingkennel.com/uploads/1/3/0/9/130969742/302426.pdfIn 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

Related samples 4

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_off000070a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70A1 7980 bytes
SHA-256: a66e7f140cc0681287711a2ece4168daf30ca8f78334b7898b0bc4bee8f2f470

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