Malicious PDF — malware analysis report

Static analysis result for SHA-256 203bea563b9b2cb1…

MALICIOUS

PDF

37.8 KB Created: 2020-04-06 05:48:01 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d6aff12dd2f4ee375c653ec4bd95e2c9 SHA-1: 75d49e52cde619c1b0e219f174dafc78b26a7694 SHA-256: 203bea563b9b2cb129ae583b71fea4b623f205aa0230989eddf22f867ab361e1
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO manipulation tactic. The ML_NYX_PDF_MALICIOUS heuristic strongly indicates malicious intent. The document body is heavily obfuscated and contains embedded URLs, further supporting the attack pattern. No scripts were extracted from this sample.

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://born-billionaire.com/uploads/1/3/0/6/130605017/130605017.html#d+and+d+auto+service
    • http://backyardposies.com/uploads/1/3/1/0/131069987/nenenumipodi.pdf
    • http://aadamtradersltd.com/uploads/1/3/1/4/131437726/9952372.pdf
    • http://leahchang.ca/uploads/1/3/0/6/130605256/merumivodegedilavi.pdf
    • http://davegomes.com/uploads/1/3/0/5/130588494/63b51.pdf
    • http://wildernessroots.com/uploads/1/3/0/4/130483309/fosode-tagome.pdf
    • http://augustmaverick.com/uploads/1/3/1/4/131411150/d28b71d77905.pdf
    • http://alservicesallyourhouseneeds.com/uploads/1/3/0/9/130969151/rakema.pdf
    • http://theresavailencourdesigns.com/uploads/1/3/1/4/131407324/wipobuvipero-divefopetaki-binogexe-ledupu.pdf
    • http://katrinadasilvaart.com/uploads/1/3/0/6/130604195/1415890.pdf
    • http://inogenoneg4.nl/uploads/1/3/0/3/130313553/jivonazav_folelofolo.pdf
    • http://tranquilvibrationsoz.com/uploads/1/3/0/6/130639648/juwexo.pdf
    • http://blackmarksproduction.com/uploads/1/3/0/3/130323106/6738001.pdf
    • http://email.koch-amps.com/uploads/1/3/1/3/131383478/muvurabetude.pdf
    • http://dare-to-be-you.com/uploads/1/3/0/6/130620998/6fb83f0e.pdf
    • http://pinecrestprintingstore.com/uploads/1/3/0/2/130289284/zafaj-zazetud-lamopevab.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_off00006926.bin
e43bc22bcf7481fe356e2105fb541ce50470956d389726e85e708e090c5cf039		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6926 8668 bytes

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