Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2a4804bf82aa152…

MALICIOUS

PDF

44.8 KB Created: 2020-05-13 05:31:54 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 38e4c3461f0f6e60c381c841f7a0a316 SHA-1: 74a1b2aea9d4a995ba70003151121cead3a5bc96 SHA-256: c2a4804bf82aa152f6378e3e09329494eaab2d76310fdb0b7668e09bb64d6a06
94 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, a technique often used for SEO manipulation or to distribute malicious content. The ML classifier strongly indicated maliciousness. While no scripts were extracted, the PDF_SEO_LINK_FARM heuristic suggests the primary purpose is to redirect users to a network of linked sites, potentially for phishing or malware distribution.

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://jtsportstherapy.org/uploads/1/3/0/3/130313333/130313333.html#conan+exiles+thralls+guide
    • http://highcountryfoodhub.com/uploads/1/3/0/6/130603976/945a20504.pdf
    • http://ganthaler.org/uploads/1/3/0/5/130540799/zefixarazababizedix.pdf
    • http://southernregalaussies.com/uploads/1/3/1/3/131384373/sodofaved_gipobuzibuw.pdf
    • http://peggymoranhorn.com/uploads/1/3/0/5/130538987/3110316.pdf
    • http://betheedutainer.com/uploads/1/3/0/4/130435516/vefasiro.pdf
    • http://mcgowaneducationalconsultant.com/uploads/1/3/0/4/130489241/maxofi.pdf
    • http://thehanger243.com/uploads/1/3/1/4/131406852/buvusitenaxi.pdf
    • http://tazzfloorsanding.com/uploads/1/3/0/5/130551576/e5c8e32c57b3e.pdf
    • http://asklisaraimondo.com/uploads/1/3/1/6/131637635/1214815.pdf
    • http://teachermelyssavipkid.com/uploads/1/3/0/2/130271073/ec95b43.pdf
    • http://libertywin88.com/uploads/1/3/0/7/130739654/dufebopesaku.pdf
    • http://alivewithautism.org/uploads/1/3/0/8/130814575/5098160.pdf
    • http://eyaar.net/uploads/1/3/0/9/130969383/nirunezasevog.pdf
    • http://kasiasyerba.com/uploads/1/3/0/6/130639673/5022544.pdf
    • http://napecape.org/uploads/1/3/1/6/131607575/bovuvamu-zojalovivudo-nijap-juwobunaxoginil.pdf
    • http://greatlengthslawns.com/uploads/1/3/1/4/131437636/pumomomiwal-suvidabuzis.pdf
    • http://elpcarpetcleaners.com/uploads/1/3/0/9/130969744/7525515.pdf
    • http://inthewayministries.com/uploads/1/3/0/5/130551518/2055963.pdf
    • http://roboty-ziemne-gdynia.pl/uploads/1/3/0/6/130621464/binetugaret-tegesoduma-zaketuroweparon.pdf
    • http://marvelousperformancesystems.com/uploads/1/3/0/5/130546717/zaponinadozutix.pdf
    • http://ryanprovencherjournalism.com/uploads/1/3/0/9/130969600/nenekogu-gemezole-rovexexenin-derupomesuba.pdf
    • http://justdonateonline.com/uploads/1/3/0/7/130738725/141490.pdf
    • http://all-things-autism.com/uploads/1/3/1/6/131637171/fexejijekibed-luxared.pdf
    • http://mankatocomedy.com/uploads/1/3/1/8/131871994/zoruvuko-wosedarelikena-rikaf.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_off00008202.bin
96ac4ec86667bfd8dc0c70913e07307afa7c8486c6ac1c55f89afc0d72eb908f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8202 10824 bytes

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