Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f40e9d36ee2ca12…

MALICIOUS

PDF

37.8 KB Created: 2020-05-16 00:57:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: c41771a18f872b11601d40d4fba160d7 SHA-1: 4e3f91cf32392f5ccd0a27e76586fc848318bbc5 SHA-256: 4f40e9d36ee2ca12781a7ef24f3079c8c96aebfe4e1287ef12c1716b7718ceb1
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are numerically or generically named, suggesting a link farm designed to improve search engine rankings or distribute malicious content. The document body, though partially corrupted, indicates a lure related to a 'Kia cerato 2011 workshop manual', which is likely a pretext to encourage users to click on the embedded malicious URLs. The ML classifier strongly supports the malicious nature of this PDF.

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://talentcatch.net/uploads/1/3/0/5/130545698/130545698.html#kia+cerato+2011+workshop+manual PDF link annotation
    • http://mvpinnovations.com/uploads/1/3/0/5/130543212/libesixusoli.pdfIn PDF document text
    • http://rightjoin.com/uploads/1/3/0/3/130313286/gavefaw_bibevoma_lozemakedixoju_wijoru.pdfIn PDF document text
    • http://theposhpet.net/uploads/1/3/0/5/130550748/marudato.pdfIn PDF document text
    • http://yflaw.org/uploads/1/3/0/3/130379391/4818621.pdfIn PDF document text
    • http://baracom.org/uploads/1/3/0/4/130477131/7ee08350cfcb73.pdfIn PDF document text
    • http://loveblanketproject.com/uploads/1/3/0/3/130323214/4177421.pdfIn PDF document text
    • http://mylocalpayroll.com/uploads/1/3/0/7/130775619/bulasesipa_besoralisap.pdfIn PDF document text
    • http://representacoespicinin.com/uploads/1/3/0/4/130489131/dozuponeg.pdfIn PDF document text
    • http://tecfrico.com/uploads/1/3/0/6/130604392/veripawevulaluwabav.pdfIn PDF document text
    • http://overiceapparel.com/uploads/1/3/0/5/130539270/lerufibasemik.pdfIn PDF document text
    • http://sostresol.com/uploads/1/3/0/2/130270873/xitebovotusevebivoni.pdfIn PDF document text
    • http://mimca-whistler.shop/uploads/1/3/0/5/130550948/948487.pdfIn PDF document text
    • http://servizigroup.com/uploads/1/3/0/4/130477192/3c6b09173eda0.pdfIn PDF document text
    • http://sunchinecleaningsvcs.com/uploads/1/3/0/8/130813306/9ff9d0ccc823cb5.pdfIn PDF document text
    • http://ryanmoore3d.com/uploads/1/3/1/4/131437941/1435305.pdfIn PDF document text
    • http://legendarymainstreamevents.com/uploads/1/3/0/6/130603761/9318253.pdfIn PDF document text
    • http://danielthurmer.com/uploads/1/3/1/0/131070442/gezewar.pdfIn PDF document text
    • http://prepstrong.net/uploads/1/3/0/5/130541662/4b7f9846fba784e.pdfIn PDF document text
    • http://thoroughbredequineservices.com/uploads/1/3/0/4/130483469/6493416.pdfIn PDF document text
    • http://landscapedesignswesthartford.com/uploads/1/3/1/8/131856590/2372262.pdfIn PDF document text
    • http://toninorestaurant.com/uploads/1/3/1/6/131607164/c4643310bc.pdfIn PDF document text
    • http://bitesizeworkouts.com/uploads/1/3/1/3/131380992/vojad.pdfIn PDF document text
    • http://jolantapilinkaite.com/uploads/1/3/0/9/130969953/9a503d1534353.pdfIn PDF document text
    • http://mchdehs.org/uploads/1/3/1/3/131380251/sokimen.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 7

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_off0000692f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x692F 9968 bytes
SHA-256: 26670427bb8895a583bbdc5dc5b2e10faa8d03a98879de3fc2f09e5e71530080

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