Malicious PDF — malware analysis report

Static analysis result for SHA-256 44769cc3ebddd932…

MALICIOUS

PDF

38.8 KB Created: 2020-03-24 16:23:11 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e3e7e2bc926b4c2666f8a4128f3fda8c SHA-1: 7e611a4c6ef591b9eb29eeb418a19b564fc41e48 SHA-256: 44769cc3ebddd93287f260ef1e7402e02ad54a7e3756993bf10be012047159f2
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, a technique often used for SEO manipulation or to distribute further malicious content. The ML classifier strongly indicated maliciousness. The document body, though partially corrupted, contains references to 'Predator 420cc engine manual' and the authoring application 'wkhtmltopdf', suggesting a potential lure or disguise for the malicious link farm. No scripts were extracted, limiting the analysis of direct execution capabilities.

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://sensitiveminds.org/uploads/1/3/0/8/130814529/130814529.html#predator+420cc+engine+manual
    • http://www.counselingandassessment.net/uploads/1/3/0/5/130590589/8204458.pdf
    • http://mrsvargas.com/uploads/1/3/0/4/130483307/lejojisofuku.pdf
    • http://stockton209cares.org/uploads/1/3/0/4/130483167/rafagenuvuzo.pdf
    • http://relaunch.biz/uploads/1/3/0/9/130969561/8c15d3040.pdf
    • http://www.catavision2030.org/uploads/1/3/0/7/130775063/4540859.pdf
    • http://jllcapitalmarketsriverwalk.com/uploads/1/3/0/5/130543462/3399097.pdf
    • http://timelessfabrications.com/uploads/1/3/0/7/130739680/nofutogedukar.pdf
    • http://www.sadiereynoldsceramicdesigns.com/uploads/1/3/0/6/130620782/4059740c.pdf
    • http://justinssuperiorlawncare.net/uploads/1/3/0/6/130639767/fdad2add8fbec.pdf
    • http://timelessprayernetwork.org/uploads/1/3/0/3/130313524/6360916.pdf
    • http://www.quantumreign.com/uploads/1/3/0/5/130551094/5854422.pdf
    • http://jeremihagelin.com/uploads/1/3/0/8/130874153/1735128.pdf
    • http://gentlemansedc.com/uploads/1/3/0/3/130323162/1590cfe0424a3.pdf
    • http://buckitupbrass.com/uploads/1/3/0/4/130483868/gepixefum.pdf
    • http://khalilmamoon.net/uploads/1/3/0/8/130814459/marevovopuvamu-xosoki-bokuk-vubazezekaxap.pdf
    • http://mkandzoellc.com/uploads/1/3/0/3/130313489/1879548.pdf
    • http://railheadband.com/uploads/1/3/0/6/130639030/gesetiza.pdf
    • http://hostmaster.quovadisconsultancy.com/uploads/1/3/0/7/130776271/waras.pdf
    • http://www.moreliafiestasinfantiles.com/uploads/1/3/0/6/130621656/99f5baba24.pdf
    • http://losdlogic.org/uploads/1/3/0/6/130639214/5fb42.pdf
    • http://myminimekidz.com/uploads/1/3/0/3/130379575/9094564.pdf
    • http://adcscripting.online/uploads/1/3/0/6/130605339/pedima-konexe.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_off00006c60.bin
04026730c4254fb6b9075db64aa9aee65ad40ac4e9de21572c83e758f7467a2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C60 8648 bytes

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