Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffe23041d5202735…

MALICIOUS

PDF

36.4 KB Created: 2020-05-19 00:13:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 86c993e26016257fef652ee5beae985d SHA-1: b5f448b714cf8cc32df53532a3b0e34fa1e58616 SHA-256: ffe23041d52027356eb8f8dc02a5b975ca51335638b170e9cd9752c2a6a03aca
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, many of which appear to be part of a link farm designed to manipulate search engine results or host malicious content. The document body contains text related to 'Citizenship test writing sentences' and metadata indicating it was generated by wkhtmltopdf, suggesting a lure to a potentially harmful website.

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://kindspa.com/uploads/1/3/1/4/131438242/131438242.html#citizenship+test+writing+sentences PDF link annotation
    • http://motomomfuel.com/uploads/1/3/0/4/130436068/b75cc27.pdfIn PDF document text
    • http://steinsmegamonstermeatbox.com/uploads/1/3/1/6/131606003/8446049.pdfIn PDF document text
    • http://minnesotarestaurant.org/uploads/1/3/0/8/130874122/9ab168c.pdfIn PDF document text
    • http://dmlogisticsltd.com/uploads/1/3/0/2/130288386/bibupumuno_rutiwetef.pdfIn PDF document text
    • http://maedaleather.com/uploads/1/3/1/1/131164573/runikanidinonupumox.pdfIn PDF document text
    • http://thinkingreverse.net/uploads/1/3/0/5/130551551/be93b2da4.pdfIn PDF document text
    • http://hg-virtual.com/uploads/1/3/0/3/130324234/9083327.pdfIn PDF document text
    • http://blockchain4environment.org/uploads/1/3/1/6/131606273/8707182.pdfIn PDF document text
    • http://partytrainproductions5818adultentertainmentstore.com/uploads/1/3/0/6/130604109/dulefovorijemek.pdfIn PDF document text
    • http://dimples-online.com/uploads/1/3/0/2/130288722/1343751.pdfIn PDF document text
    • http://action-appliance-installation.net/uploads/1/3/0/6/130604222/4144350.pdfIn PDF document text
    • http://geoffreyrafehall.ca/uploads/1/3/1/4/131453144/108297c148021d.pdfIn PDF document text
    • http://xn--logopraxis-lbeck-uzb.de/uploads/1/3/0/9/130969182/4436937.pdfIn PDF document text
    • http://mirjambutzbrown.com/uploads/1/3/0/5/130589442/9705096.pdfIn PDF document text
    • http://bradleyhartmanbakken.net/uploads/1/3/0/2/130271011/wabuviletate.pdfIn PDF document text
    • http://queenscyclingclub.org/uploads/1/3/0/8/130874409/7513464.pdfIn PDF document text
    • http://fancyklutz.com/uploads/1/3/0/5/130588415/0f57c5fbdcb401.pdfIn PDF document text
    • http://chotchkiss.com/uploads/1/3/0/6/130620401/8627050.pdfIn PDF document text
    • http://simrananand.com/uploads/1/3/0/5/130588780/kimevi_wuwidik_tapago_weloneduwo.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_off00006334.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6334 10220 bytes
SHA-256: 546225d5ac4271af03ed04d30490b222e89fabd14d1d6315e5c35c3b8c811166

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