Malicious PDF — malware analysis report

Static analysis result for SHA-256 adde2f37c9c41d9c…

MALICIOUS

PDF

128.6 KB Created: 2020-04-08 07:45:35 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0247a3812d6cae897fbd2afdfbc71f82 SHA-1: b6448bbbbf7ea51991f3283fc9d0f91a0731f7c0 SHA-256: adde2f37c9c41d9c540d0678b591fcc0a4dc97e8e6346fea606949f564704224
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links to other PDFs hosted on various domains, indicative of a link farm or SEO spam tactic. The primary lure appears to be related to a book titled 'El poder del metabolismo frank suarez gratis'. The ML classifier strongly flagged this PDF as malicious. The presence of numerous external links suggests a campaign to drive traffic to potentially malicious sites or to distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://pc-helpme.com/uploads/1/3/1/3/131379820/131379820.html#el+poder+del+metabolismo+frank+suarez+gratis
    • http://smootpc.com/uploads/1/3/0/2/130287953/navidumerukota.pdf
    • http://webmail.kindredcoffeeroasters.com/uploads/1/3/0/2/130271048/2288050.pdf
    • http://jbten.com/uploads/1/3/0/4/130489159/f64492a3b60.pdf
    • http://marycrowleyconsulting.com/uploads/1/3/0/2/130272483/65501ef8e5e7d.pdf
    • http://craniosacralnashville.com/uploads/1/3/0/7/130739476/6120773.pdf
    • http://rja-designsbyslaglellc.com/uploads/1/3/0/6/130621873/1505326.pdf
    • http://azureheals.com/uploads/1/3/0/8/130874127/1135435.pdf
    • http://themisenterprises.com/uploads/1/3/0/9/130969243/6210320.pdf
    • http://canuplaysport.com/uploads/1/3/0/8/130873855/7193067.pdf
    • http://raymondsawyer.com/uploads/1/3/0/6/130604332/nujuxakigezosemezi.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_off0001cb0b.bin
b1c82bb7b7386d16c2450503c1f31ede361e23a4606d6bbdaad1fc2b6b6aa087		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1CB0B 11464 bytes

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