Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ea52e973420b775…

MALICIOUS

PDF

38.8 KB Created: 2020-03-09 01:20:33 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 9aad1ca984a45dc748f7cf064289221e SHA-1: 06dd7f7fc39e89f76b2cd1fdcc5a7d0fca7b2176 SHA-256: 4ea52e973420b7756b03b96adbcb64d0e5b2050c58da06f4e8d05dd3ee893406
92 Risk Score

Malware Insights

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

This PDF file was identified as malicious by an ML classifier. It contains a large number of external links, characteristic of a link farm designed for SEO manipulation. The primary URL points to a page with content related to 'adjustment disorder', likely a lure to disguise the malicious intent. No scripts were extracted, and the document body is heavily obfuscated, but the presence of numerous external links strongly suggests a redirection or phishing scheme.

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://adsl-63-204-18-56.benefitplans.org/uploads/1/3/0/2/130271098/130271098.html#adjustment+disorder+with+mixed+anxiety+and+depressed+mood+dsm+v+code
    • http://www.theluckyfewbooksandfundraising.com/uploads/1/3/0/4/130489359/tubiz_larudon.pdf
    • http://skydivepleasantvalley.com/uploads/1/3/0/5/130541131/vesozike.pdf
    • http://www.dispatchdiaries.com/uploads/1/3/0/5/130546486/02209805fc3.pdf
    • http://www.hospitalsites.org/uploads/1/3/0/8/130813669/2a44d49e79d.pdf
    • http://www.hanscerealcafe.com/uploads/1/3/0/5/130590265/ferokagifesi.pdf
    • http://peopletranslating.com/uploads/1/3/0/3/130323266/4141617.pdf
    • http://autodiscover.lisasprettypups.com/uploads/1/3/0/2/130274145/bd052354.pdf
    • http://suckingatlife.com/uploads/1/3/0/7/130738693/6259288.pdf
    • http://mayaarchaeology.net/uploads/1/3/0/3/130313378/mokesutadalufe.pdf
    • http://speakingtotheocean.com/uploads/1/3/0/7/130739975/fd1ff2d7adbdc.pdf
    • http://refi-llc.net/uploads/1/3/0/8/130814126/7aff4a407.pdf
    • http://stampedconcretemiami.com/uploads/1/3/0/7/130739590/a4c84df55.pdf
    • http://asopatia.org/uploads/1/3/0/7/130739247/texaf.pdf
    • http://africanblackant.net/uploads/1/3/0/8/130874039/webuxote-fekisirevatin-riguwugo.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_off00006fc3.bin
446e3ca819863c7f06c0f409617bc7b89ef8c6e93587df9fb230e9b84d728142		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FC3 7516 bytes

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