Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc31adc31360262e…

MALICIOUS

PDF

31.7 KB Created: 2020-04-16 04:47:23 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 6d50bccbc4a9ca3210723c85f46d649d SHA-1: 8a938bc0503e842cb90869d9a22ef6b56f22b281 SHA-256: dc31adc31360262eac67a1a96d8faa19931258c6f61f4a5db23960b31c6409c6
62 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various PDF files hosted on different domains, suggesting a link farm or a distribution mechanism for further malicious content. The document body itself is heavily obfuscated but contains some of the same URLs, reinforcing the link-heavy nature of the attack. No scripts were extracted from this sample.

Heuristics 3

  • 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
  • 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://resolveoh.com/uploads/1/3/0/9/130969346/130969346.html#bar+chart+android+studio
    • http://bangencreations.com/uploads/1/3/0/6/130639362/749160.pdf
    • http://atawhaifarmandwild.com/uploads/1/3/1/3/131379276/ratozexelinimideba.pdf
    • http://marilynphillipsinsurance.net/uploads/1/3/0/2/130273814/3323443.pdf
    • http://hiddenwounds.net/uploads/1/3/0/8/130873953/bugemejejosagumakone.pdf
    • http://fashionplus1.com/uploads/1/3/1/4/131406438/f8ba873d20c46.pdf
    • http://americaheldhostagemovie.com/uploads/1/3/0/7/130776858/levozavebobig_kelegilajalune.pdf
    • http://katesphotos.com/uploads/1/3/1/3/131379198/4061659.pdf
    • http://betsyjasper.com/uploads/1/3/0/3/130379305/2d03966f.pdf
    • http://alpinepro2000.com/uploads/1/3/0/5/130545493/b36a6c0.pdf
    • http://txlatindance.com/uploads/1/3/0/2/130273581/farijakufo_gumofiku.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_off0000549b.bin
864684aeba0adc319c8b3e4d5d54a89fbda9286a1c5037dcbbe67bb5ba126693		 pdf-font-stream PDF embedded font (sfnt) at offset 0x549B 8060 bytes

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