Malicious PDF — malware analysis report

Static analysis result for SHA-256 5797a298093e6d57…

MALICIOUS

PDF

31.3 KB Created: 2020-05-25 17:28:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2bcb4e94d3458e7803a019ddb2af9221 SHA-1: a93f01aff6d08a98bcfa3f87dab473087e5c184f SHA-256: 5797a298093e6d57e4821cc85af68d18000418923dc88286a53d00fd4763cbd7
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO spam campaign. The ML classifier also flagged this PDF as malicious. The document body contains garbled text and embedded URLs, further supporting the malicious intent of redirecting users to potentially harmful websites.

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://3ljmr.bpmtc.com/uploads/1/3/0/5/130550955/130550955.html#lagu+ost+the+huntsman+winter%2527+s+war
    • http://act4fun.com/uploads/1/3/0/9/130969983/203a1ec1c.pdf
    • http://possingworthflatcoats.com/uploads/1/3/0/6/130604720/7f507051bbc209.pdf
    • http://starlightsuite.ca/uploads/1/3/1/4/131482939/batexebubogudimusi.pdf
    • http://dritascleaningcompany.com/uploads/1/3/0/3/130379158/6342517.pdf
    • http://karlagillespieaesthetics.com/uploads/1/3/0/6/130639133/df12896b1d3c55.pdf
    • http://kbpropertyinvestments.com/uploads/1/3/0/6/130604039/3e726cfdf6ae31.pdf
    • http://trinitymtcarmelchurch.com/uploads/1/3/0/5/130590738/dawix-toxoxe.pdf
    • http://highwoodmustangs.com/uploads/1/3/0/6/130620796/6953005.pdf
    • http://creativemarketingstimulus.com/uploads/1/3/1/8/131857314/cba4d31.pdf
    • http://hannahwilliamssportstherapy.com/uploads/1/3/1/3/131380043/6643278.pdf
    • http://corporativolazval.com/uploads/1/3/0/2/130272906/8cc1f96449.pdf
    • http://agaperadioonline.org/uploads/1/3/0/2/130270911/9182951.pdf
    • http://gqtrav.com/uploads/1/3/0/7/130775049/jirovomugogez.pdf
    • http://cpanel.kansaspoets.com/uploads/1/3/0/5/130588676/wexumefivuroj.pdf
    • http://pierceforum.org/uploads/1/3/0/6/130640048/9b26d27d9.pdf
    • http://mortgageexitteam.com/uploads/1/3/0/7/130776025/legaba_vujolasez_toninufaf_sujurowuzoru.pdf
    • http://familysuccesscenter.net/uploads/1/3/0/6/130639729/mejisi_bonoxokarij_pawurut_kosopowujeneri.pdf
    • http://jonnyhrab.com/uploads/1/3/0/5/130546486/jijumawonasikifelur.pdf
    • http://norilsknickellogistics.nl/uploads/1/3/0/7/130738638/7653418.pdf
    • http://olympiasts.com/uploads/1/3/0/5/130588924/xabuba_gavipokolonaw_zeralal_felizimov.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_off00005009.bin
b5ba7d20f74cbc9dc1c5e5f25f85123e1095467a0e8b2c220fc158b79a778e89
pdf-font-stream PDF embedded font (sfnt) at offset 0x5009 10036 bytes