Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b42ce4eaa5c45e3…

MALICIOUS

PDF

39.4 KB Created: 2020-03-13 11:50:49 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c55e5f3cefe732246601ff0be697e002 SHA-1: dae93860356c1440d88d6168d4ac1a6471c1a7a8 SHA-256: 5b42ce4eaa5c45e3125db5d3cda8cfa0f7d20a6fad538ea92563e82c700cffb4
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, which is a common technique for SEO manipulation or distributing malicious content. The ML classifier strongly indicated maliciousness, and the presence of numerous external URLs suggests a potential for further compromise or redirection to malicious sites. No scripts were extracted, but the structure itself is highly suspicious.

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://drywallnewmarket.com/uploads/1/3/1/1/131164128/131164128.html#aristotle+nicomachean+ethics+book+one
    • http://mgsesl.com/uploads/1/3/0/6/130605448/b7ac072.pdf
    • http://girlsliewhenboyscry.com/uploads/1/3/0/7/130776063/4105881.pdf
    • http://epsaofficial.eu/uploads/1/3/0/6/130605432/kokasuxugeruduk_ropipon_sukerezisejoti.pdf
    • http://metrophoenixhypnotherapy.com/uploads/1/3/0/7/130776104/a4ac8.pdf
    • http://pcmraleigh.org/uploads/1/3/0/4/130476650/ruvanegariz_bawululep.pdf
    • http://greece.tangotab.com/uploads/1/3/0/5/130588477/4994531.pdf
    • http://cocktailsnponytails.com/uploads/1/3/0/7/130740351/fatuxijegorinujolow.pdf
    • http://womanwithamoviecamera.org/uploads/1/3/1/0/131070579/bamakajixizekap.pdf
    • http://longhorncaverns.org/uploads/1/3/0/3/130323485/6632778.pdf
    • http://nashvillebowling.org/uploads/1/3/0/5/130588345/mebiramu_furini.pdf
    • http://elizabethrhyne.com/uploads/1/3/0/6/130639862/tugare-fogozagujejotal-kewivakaxekeru.pdf
    • http://tinaking.pink/uploads/1/3/0/8/130815080/zosovovusok.pdf
    • http://melissajwebster.com/uploads/1/3/0/6/130604349/menasizizitori.pdf
    • http://footietransfers.com/uploads/1/3/0/6/130604610/loxit-mekeg-fatujipanige-sokis.pdf
    • http://learnmormonfacts.com/uploads/1/3/0/4/130476207/fikadeke.pdf
    • http://www.expungemyrecordfla.com/uploads/1/3/0/4/130483263/sogepazibijojofa.pdf
    • http://freebies4mama.com/uploads/1/3/0/4/130435960/kirugibib_teluxikiremu_setinaxawesobu_dorutanenadoj.pdf
    • 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/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000741d.bin
c97c357fce026c977e980540bc2569b01758f4ef5fbc400bd395e13c0c35973a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x741D 7172 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.