Malicious PDF — malware analysis report

Static analysis result for SHA-256 2861d770b309a7dd…

MALICIOUS

PDF

43.9 KB Created: 2020-03-31 02:06:26 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 43a66f97f0ebd93a526a992ff3263ef6 SHA-1: 15700112b3fc1105192873245c6d67d48037ea85 SHA-256: 2861d770b309a7dd7c23873882c163c71557f1e699ddde536fee3bed8f998e03
62 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to other PDF files hosted on various domains. The primary URL, http://heavenlyhandsonline.com/uploads/1/3/0/9/130969030/130969030.html#como+sacar+el+area+de+un+circulo+para+primaria, is presented with a seemingly educational title. This suggests a link farm or SEO poisoning tactic designed to drive traffic to potentially malicious or low-quality content. The heuristic 'PDF_SEO_LINK_FARM' strongly indicates this malicious intent.

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://heavenlyhandsonline.com/uploads/1/3/0/9/130969030/130969030.html#como+sacar+el+area+de+un+circulo+para+primaria
    • http://ipadbootcampforparents.com/uploads/1/3/0/5/130551008/jumenulufiwuwo.pdf
    • http://nolimitsfitnesswear.com/uploads/1/3/0/6/130605179/8723843.pdf
    • http://akashicrecordmedia.com/uploads/1/3/0/5/130589348/dc9a689959e341a.pdf
    • http://anaake.com/uploads/1/3/0/4/130492889/0eaf788e0.pdf
    • http://dstuddistributing.com/uploads/1/3/1/1/131164471/009c63077bff8.pdf
    • http://xn--rckentherapeut-gsb.com/uploads/1/3/0/8/130873945/suzalu_kodases_sinorobadiwovul_gugok.pdf
    • http://americanmemorialpark.org/uploads/1/3/0/5/130589450/958638.pdf
    • http://ifyourelucky.com/uploads/1/3/0/7/130738806/ac342f0490.pdf
    • http://cravecateringservices.net/uploads/1/3/0/5/130550700/7856984.pdf
    • http://pickeringcarpentry.com/uploads/1/3/0/6/130620947/marin-bumikijamuxu-bavabuzirogebu.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007619.bin
87fd190fef3e3d2f3ee2f09eed98da100bfc805a03a316396343e06b25f5e560		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7619 8848 bytes
font_01_sfnt_off00009692.bin
f28f4037c2f587c07bd464c4b2f47b33d72894c0e3f205f57cb7d8b479804712		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9692 2832 bytes

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