Malicious PDF — malware analysis report

Static analysis result for SHA-256 81a8a7ec3c69cc8b…

MALICIOUS

PDF

35.7 KB Created: 2020-04-08 23:51:18 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 01a29187ce25b666d8442fc5a799b996 SHA-1: bc470643b437434402492774ad970aaa80c51971 SHA-256: 81a8a7ec3c69cc8bcf2c173c6a1644a3dd93cd8675eb8072996c65ed3acbd445
92 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, a technique often used for SEO manipulation or to distribute malicious payloads. The heuristic 'PDF_SEO_LINK_FARM' specifically identifies this behavior, indicating the document's primary purpose is to act as a gateway to other potentially harmful content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://jumpstartyourhabits.com/uploads/1/3/0/7/130738731/130738731.html#www+sploder+com
    • http://poolmaxstore.com/uploads/1/3/0/9/130969652/8409191.pdf
    • http://30oakst1.com/uploads/1/3/0/5/130544652/nidepegevo-letepasivufiwu.pdf
    • http://whidbeycooks.org/uploads/1/3/0/3/130323488/lawaxikatolumax-jumamapisuve-jubigedunuxetew-didodexavidetom.pdf
    • http://eilermannhomevideos.com/uploads/1/3/0/3/130313454/gewuzelib-kijumizitewevid-vusafavaji-sidimori.pdf
    • http://its8080.com/uploads/1/3/0/4/130489833/jabolugexurave.pdf
    • http://rvanderheiden.com/uploads/1/3/0/6/130621619/3562780.pdf
    • http://scstrainingofohio.com/uploads/1/3/0/5/130551089/tununetitezodo.pdf
    • http://fascatipizza.com/uploads/1/3/0/5/130588688/4628470.pdf
    • http://historicmiramar.com/uploads/1/3/0/2/130272580/zufore.pdf
    • http://annalakrua.com/uploads/1/3/0/8/130814177/856e676dd6c.pdf
    • http://pslholdings.com/uploads/1/3/0/6/130604229/1131290.pdf
    • http://risefootballdevelopment.com/uploads/1/3/1/0/131070434/451e24c23338.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_off00006436.bin
f7efc6e3c1879a5d5a1f008b153049fda14f4370b9f48211813650e638047d62		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6436 7692 bytes

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