Malicious PDF — malware analysis report

Static analysis result for SHA-256 04967e2a44bee8f5…

MALICIOUS

PDF

39.4 KB Created: 2020-05-24 15:14:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e35aefa6ea5745b45d12109be5a09ab5 SHA-1: 7f4b787b4936c08e2a0c7d09d6a95547a637a7cd SHA-256: 04967e2a44bee8f570cc856416c973d2df81b4bddef168bd333acfc3942bd2d0
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of external links, many of which point to other PDF files with numeric slugs, suggesting a link farm or SEO abuse tactic. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of numerous external URLs indicates a potential for hosting malicious content or redirecting users to phishing sites.

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://kathleen-cortez.pleasingfood.com/uploads/1/3/0/3/130323301/130323301.html#dragon+nest+leveling+guide+1-95+sea
    • http://newyearnourishment.com/uploads/1/3/0/7/130775977/b6cb9143804da97.pdf
    • http://cenovelcritiques.com/uploads/1/3/0/4/130436136/zuduwologuwimupug.pdf
    • http://khconstruct.adviser.live/uploads/1/3/0/7/130775162/8427436.pdf
    • http://accessoriessonecessary.com/uploads/1/3/0/5/130589163/9807963.pdf
    • http://umdrfc.org/uploads/1/3/0/5/130588509/5833248.pdf
    • http://murdock4senate.com/uploads/1/3/0/2/130287246/doxoralasew-zimakorisuf-zufasekupixep-lifuseja.pdf
    • http://osage-district-speech.com/uploads/1/3/0/7/130776814/wakuji_gaduvefozulawe_dasasudo_rovexuvakip.pdf
    • http://rollingoaksmemorialcenter.org/uploads/1/3/1/4/131406473/2208792.pdf
    • http://chasey-lain.com/uploads/1/3/1/4/131410939/zezasotetet_xelepigofawabuf_memonuwiwu_bimaxufiruzit.pdf
    • http://homecleanerschicago.com/uploads/1/3/1/6/131637570/4b481012767b0.pdf
    • http://rainbowrehabtherapy.com/uploads/1/3/0/6/130604872/xetegorisofujozuvija.pdf
    • http://totalcleaningservices.info/uploads/1/3/0/6/130603828/xabumajuwudevizure.pdf
    • http://tacconeconstruction.com/uploads/1/3/0/4/130435857/d054a0dee.pdf
    • http://millercustomconstruction.net/uploads/1/3/0/4/130491752/nigupevovon.pdf
    • http://paradisecitybeach.com/uploads/1/3/1/4/131406800/ba084925.pdf
    • http://climaxdesigners.com/uploads/1/3/1/6/131637584/kesafuvoxa.pdf
    • http://blindcreekoutfitters.ca/uploads/1/3/0/3/130313242/cbeb659.pdf
    • http://proasin.net/uploads/1/3/0/7/130738996/tezozeze.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006025.bin
f37d347831cd531ce515e209f031bea723fbc7e706b90876efdc6809b1656767		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6025 21528 bytes

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