Malicious PDF — malware analysis report

Static analysis result for SHA-256 7aa2c946b60ff54d…

MALICIOUS

PDF

58.2 KB Created: 2020-05-06 05:33:16 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1c20478257e20f8a00a40e22910b9ab1 SHA-1: 7193aba514205dc60e2f2acaa758af81f5f9e29b SHA-256: 7aa2c946b60ff54d609ad4daecbe8c143fd86c87ca34f46f85b12ca63f50004d
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or distribution mechanism. The ML classifier also strongly indicated maliciousness. The embedded URLs point to various PDF files, likely intended to lure users or manipulate search engine results. No scripts were extracted, limiting the analysis of direct payload execution.

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://myentouragemusic.com/uploads/1/3/0/7/130775583/130775583.html#mapbox+studio+classic+windows
    • http://melonfry.com/uploads/1/3/0/6/130605059/96c114.pdf
    • http://captainclive.net/uploads/1/3/1/4/131453005/dixerow-jolariwelu.pdf
    • http://kingofthecooptampa.com/uploads/1/3/0/2/130270966/pomivivus.pdf
    • http://montclair-lakesideapartments.com/uploads/1/3/1/4/131406082/texifogexonagik_sebojepule_limunegas_gekokadiwunu.pdf
    • http://daryeelmedicines.com/uploads/1/3/0/5/130539223/19ef2.pdf
    • http://curvybridesboston.com/uploads/1/3/0/2/130288720/latul-wusasibejo-pifod.pdf
    • http://citywidevalet.com/uploads/1/3/0/8/130874333/4265381.pdf
    • http://a-7713.com/uploads/1/3/1/3/131380977/907a9f4078.pdf
    • http://genius-encel.com/uploads/1/3/0/5/130588772/9331629.pdf
    • http://shidduchadvice.com/uploads/1/3/0/6/130620565/menoteta-robisuvaxijoxu-fivon.pdf
    • http://glendabarrington.com/uploads/1/3/0/5/130588442/buvod.pdf
    • http://bodspecsdeluxtraining.com/uploads/1/3/1/6/131606295/vijuxiwaxosevow-rewaroxobetaf-xesobitajola.pdf
    • http://omniplast-de.net/uploads/1/3/0/8/130814311/39b9538eebdd4b4.pdf
    • http://aussiewealthsuper.com/uploads/1/3/0/5/130550925/vesigadasetakabe.pdf
    • http://docruby.me/uploads/1/3/0/6/130640040/jawazomazalated-zovesene-tilog.pdf
    • http://lulabysarah.com/uploads/1/3/0/4/130483295/289ab.pdf
    • http://artispira.com/uploads/1/3/0/4/130476887/7600382.pdf
    • http://hoame.net/uploads/1/3/0/4/130490245/pazitifagox-gevamibuloru-davezatagariju-popozurevo.pdf
    • http://partnerreach.net/uploads/1/3/1/6/131636908/fomuzaxuju-xebusudune-dusen-benivonizuf.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • 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_off0000b775.bin
5481fa9ae7f6f1937a6a92cc98ee69a55d07fb8f625cec8af8e71b691c64a21e
pdf-font-stream PDF embedded font (sfnt) at offset 0xB775 11400 bytes