Malicious PDF — malware analysis report

Static analysis result for SHA-256 93254c1e57f0a61e…

MALICIOUS

PDF

48.4 KB Created: 2020-06-11 23:44:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 98a8c78aa5750730e1c94b978aa2fdd0 SHA-1: 082a4e04e21b3543145fe5663fc934be6f7ad926 SHA-256: 93254c1e57f0a61ea1a25be1145cd976f606cd9411cfd068e27a83ba73980a46
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a technique often used for SEO poisoning or to redirect users to malicious sites. The document body, though heavily obfuscated, contains text related to a "three wheel exercise scooter" and references the authoring application, suggesting a lure. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a link farm.

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://mail.holdmetightasheville.com/uploads/1/3/1/4/131453050/131453050.html#three+wheel+exercise+scooter PDF link annotation
    • http://chevysalesgirl.com/uploads/1/3/0/9/130969042/9946871.pdfIn PDF document text
    • http://amymariakidmohair.com/uploads/1/3/0/6/130639463/abbe5aa79da2b.pdfIn PDF document text
    • http://joannecostallconsultancy.co.uk/uploads/1/3/0/9/130969811/welamozadizonuxod.pdfIn PDF document text
    • http://accordlogistics.com/uploads/1/3/0/5/130546486/daxivuke.pdfIn PDF document text
    • http://operationsongcolorado.org/uploads/1/3/1/4/131454394/sagavegavunibe.pdfIn PDF document text
    • http://classicvirgo.com/uploads/1/3/0/4/130488417/2944676.pdfIn PDF document text
    • http://cwh.cascadesnowdesigns.com/uploads/1/3/1/4/131437162/9394922.pdfIn PDF document text
    • http://thejewelersworkbench.net/uploads/1/3/1/3/131398102/xeroduve.pdfIn PDF document text
    • http://imaginoia.xyz/uploads/1/3/0/3/130323717/regugo_tafuf_buminuvozodota.pdfIn PDF document text
    • http://telkes.virtus.hu/uploads/1/3/0/3/130323339/kupagafavem.pdfIn PDF document text
    • http://ecuriebarnton.com/uploads/1/3/0/7/130739260/7088533.pdfIn PDF document text
    • http://drbugge.com/uploads/1/3/0/7/130775879/aaf2fa0.pdfIn PDF document text
    • http://southbendwarehousing.com/uploads/1/3/1/0/131070469/dugopizav-ratogexusemegor.pdfIn PDF document text
    • http://emilydurrett.com/uploads/1/3/0/6/130621741/2635605.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://metemejeko.files.wordpress.com/2020/06/64652488742.pdfIn PDF document text
    • https://nitufomujame.files.wordpress.com/2020/06/62362666202.pdfIn PDF document text
    • https://popidoz.files.wordpress.com/2020/06/92742344096.pdfIn PDF document text
    • https://xopaluwefaje.files.wordpress.com/2020/06/vinozokodasiratab.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
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

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_off00008ebb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EBB 11380 bytes
SHA-256: 800a36173df95ae5a5771a12e32cd19523801ef3bb4532ee1520503bae48a799

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