Malicious PDF — malware analysis report

Static analysis result for SHA-256 35f901f9b49d4ad2…

MALICIOUS

PDF

41.8 KB Created: 2020-03-30 04:45:37 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e4c29deb8e6900b91d398ceb87310597 SHA-1: 158b226a30216e0649ca5de53a687eb04fc48027 SHA-256: 35f901f9b49d4ad23d797b2621d40d8171fb4a2f797d32c6fdff570ae174e119
96 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 redirect users to malicious sites. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains URLs that are repeated across many other extracted URLs, suggesting a link farm or redirection scheme. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://moodlabnewlife.nl/uploads/1/3/0/4/130475992/130475992.html#acoustic+blues+licks+pdf
    • http://cotaaldia.com/uploads/1/3/0/7/130740069/tixemezujurevur.pdf
    • http://mowjoelandscaping.com/uploads/1/3/0/2/130288753/7da2bd693c81c0.pdf
    • http://otbg-togo.com/uploads/1/3/0/3/130313500/moponikiriwaje.pdf
    • http://alkiadvcamp.com/uploads/1/3/0/3/130313173/3283513.pdf
    • http://usd284.com/uploads/1/3/0/7/130775589/mufupuwavero-janot-lesosi-vidukufiviguxu.pdf
    • http://aboutserenaryan.com/uploads/1/3/1/1/131164034/7e43114.pdf
    • http://thefitmamma.online/uploads/1/3/0/6/130604646/df9c40d0a658.pdf
    • http://activelnternational.com/uploads/1/3/0/2/130272585/2641642.pdf
    • http://borderlawoffice.net/uploads/1/3/0/7/130775729/disamukijuf.pdf
    • http://ottawasmortgagebroker.ca/uploads/1/3/1/0/131070212/nivisixoxitazapo.pdf
    • http://tierrasnativas.com/uploads/1/3/0/2/130291328/xemizopad.pdf
    • http://axelconsultancy.com/uploads/1/3/0/7/130776885/tuzizi.pdf
    • http://madewithheart.org/uploads/1/3/0/6/130621165/dagodupu.pdf
    • http://otionos.com/uploads/1/3/0/4/130488547/9616e6d9.pdf
    • http://q8caad.com/uploads/1/3/0/8/130814129/19fc3e4c.pdf
    • http://mambomoose.com/uploads/1/3/0/8/130814510/1868030.pdf
    • http://111-pod.site/uploads/1/3/0/7/130739513/4181161.pdf
    • http://diamondlospoblanos.com/uploads/1/3/0/2/130287895/4ae2084de97d.pdf
    • http://imsspecialist.eu/uploads/1/3/0/8/130874473/pajug-gizowojuboje.pdf
    • http://dollywoodshirts.com/uploads/1/3/0/2/130273850/rovinekor-zujetugagumusam-lulogijir-dojotuwudej.pdf
    • http://m.carolinamountainreefs.com/uploads/1/3/0/7/130739132/fepulovom.pdf
    • http://vrealdesign.com/uploads/1/3/0/6/130639956/7446848a4f05.pdf
    • http://collinsmslibrary.org/uploads/1/3/0/7/130739502/ce0a8f0f1.pdf
    • http://nationalabrasivesaustralia.com/uploads/1/3/0/5/130589310/remefe-gevutagixonefed-lagokominulevib.pdf
    • http://psuram.org/uploads/1/3/0/9/130969237/d7e1ab90c37f4.pdf
    • http://psuram.org/up
    • 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_off00007870.bin
b9db849972ea5a85feaca22b107469b554190fc57822629e107158f6852b5704		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7870 8340 bytes

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