Malicious PDF — malware analysis report

Static analysis result for SHA-256 355d6e999e8625fb…

MALICIOUS

PDF

30.8 KB Created: 2020-04-14 08:52:09 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f3b4c9124fe4c7041e93dfdb5abccd6d SHA-1: 0025bc96e920555bbb68361b23e041aa7b8eae06 SHA-256: 355d6e999e8625fb89fdc09ac093b04e23426d5f01653709c405f29c88a29749
94 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are numerically or generically named, suggesting a link farm or SEO poisoning tactic. The document body contains text related to 'Borat full movie free', indicating a lure to entice users to click on the embedded malicious links. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

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://joyearl.com/uploads/1/3/0/2/130289021/130289021.html#borat+full+movie+free
    • http://mvmountainlodge.com/uploads/1/3/1/4/131454116/046d9aa.pdf
    • http://foodandmedia.net/uploads/1/3/0/2/130288798/xirijuv.pdf
    • http://frazierhillfarm.com/uploads/1/3/1/3/131384232/mebewep_xibeweribi_diren.pdf
    • http://northernlightsparanormalofnd.org/uploads/1/3/0/6/130620410/difadojigarul.pdf
    • http://apexcareservices.org/uploads/1/3/1/0/131070588/jodorajigux-sajopekigigem-wijetoveturiso-zanowofirav.pdf
    • http://artandfilmlover.com/uploads/1/3/0/5/130541688/8480307.pdf
    • http://evolveohio.com/uploads/1/3/0/5/130540040/pesepilumunepaboxita.pdf
    • http://dostal.at/uploads/1/3/0/7/130776891/8615525.pdf
    • http://emmaelegance.com/uploads/1/3/0/2/130273735/7681805.pdf
    • http://dollarsfordoorsllc.com/uploads/1/3/0/6/130621689/6898811.pdf
    • http://lealeocreative.com/uploads/1/3/0/7/130775751/e8528.pdf
    • http://rivalconstructionservices.com/uploads/1/3/1/4/131438280/50e1fafdea02.pdf
    • http://imac-usa.com/uploads/1/3/0/2/130292073/1d48ae858934.pdf
    • http://success-culture.com/uploads/1/3/0/3/130313158/kuxefavipok.pdf
    • http://santarosalandscaping.org/uploads/1/3/1/0/131071240/tajolu.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_off0000526f.bin
53d312cf2b7a75c65ccf8533b91a20068485ea3499ac5c88254413e1bba3e472		 pdf-font-stream PDF embedded font (sfnt) at offset 0x526F 7332 bytes

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