Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d2af4264ae180af…

MALICIOUS

PDF

41.4 KB Created: 2020-04-01 16:55:17 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 8fc19443c10bc402e38b847f7779c11d SHA-1: 3a2b65672151ee79129e94b5b3d906bb5ba2aa35 SHA-256: 5d2af4264ae180af591a0c36c91071e2e0ec8fe851c6709727afccc1ea95ba68
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO manipulation tactic. The ML classifier also strongly flagged this PDF as malicious. The embedded links likely serve to direct users to potentially malicious content or phishing sites.

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://koltenterprise.com/uploads/1/3/0/6/130604456/130604456.html#citing+websites+in+text+apa+examples
    • http://plumandmoss.com/uploads/1/3/1/3/131379061/2849d.pdf
    • http://madeinmanette.com/uploads/1/3/1/4/131453248/5478621.pdf
    • http://turkeytrackwines.com/uploads/1/3/1/4/131405927/mojoziguk_kegosukonif_popasa_mibipowidironax.pdf
    • http://bellinghaminspector.com/uploads/1/3/0/3/130379132/zuvuzunux_nupulevamavi_xiluradege.pdf
    • http://roadapedia.com/uploads/1/3/0/7/130775355/juvotawegatawo_soberugodanit_valaxiwuwijuma.pdf
    • http://bschealthcare.com/uploads/1/3/0/5/130551653/lutinovibagube-raliloresapelin-finaxob.pdf
    • http://grwedguild.org/uploads/1/3/0/7/130740008/6830669.pdf
    • http://nmacae.org/uploads/1/3/0/6/130639126/jaxovanobeza_visuxogup_dijep_xizozev.pdf
    • http://backtobal.com/uploads/1/3/0/4/130476043/c5e0dc.pdf
    • http://mrsmorones.com/uploads/1/3/0/5/130590531/kadobalofe.pdf
    • http://serrurerie-lemercier-artisan.com/uploads/1/3/0/7/130738798/bijiludunivefan-zunakubim.pdf
    • http://decktek.info/uploads/1/3/0/4/130435891/b85bb871c31e5.pdf
    • http://canyondesigninc.com/uploads/1/3/0/8/130813079/7d45f170a24827f.pdf
    • http://simplyorganize.expert/uploads/1/3/0/3/130323151/nomotumatujegekav.pdf
    • http://absolutemindfulnessberkshire.com/uploads/1/3/0/5/130551687/pegum_tuxunolezilevol_zimenategi.pdf
    • http://traktucson.com/uploads/1/3/1/4/131437593/1133944.pdf
    • http://recordinghomestudiogear.com/uploads/1/3/1/3/131383772/3198582.pdf
    • http://scarletexposurephotography.com/uploads/1/3/1/4/131406068/2f7520204512c4.pdf
    • http://argentaccountingsolutions.com/uploads/1/3/0/6/130622013/nafigokasixoro_movonibil.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_off00007803.bin
18d29c8ad2b3497fcc3e604a5e88424ff4be69d87c6c1a1ed948c472430ab191
pdf-font-stream PDF embedded font (sfnt) at offset 0x7803 8276 bytes