Malicious PDF — malware analysis report

Static analysis result for SHA-256 95d723832041c5fa…

MALICIOUS

PDF

42.2 KB Created: 2020-03-12 02:07:09 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 25f736eef7eabce4a55915a1043331a3 SHA-1: 587b6e3edccd8b64e530c85882d6804bbdbc4885 SHA-256: 95d723832041c5fabe1a27c013de42cad45ba14690c0fdab54d874cf83ed7d32
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO poisoning attack. The ML classifier also strongly indicated maliciousness. The embedded URLs point to various domains, all likely serving as part of this malicious infrastructure.

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://host80.carmichaelnl.com/uploads/1/3/0/6/130639775/130639775.html#saturated+adiabatic+lapse+rate+depends+on+temperature
    • http://5weeksto140.com/uploads/1/3/0/7/130739445/kukoletisetewi-gefiw-fikona-bemovumosubum.pdf
    • http://wkerwin.com/uploads/1/3/0/9/130969277/3430277.pdf
    • http://canodyn.com/uploads/1/3/0/4/130483508/finamiveveriwinosa.pdf
    • http://collectionof.org/uploads/1/3/0/6/130620788/57b338.pdf
    • http://windfallpartners.net/uploads/1/3/0/5/130539016/lomise_xebuzefifuj_datifikibavozaj.pdf
    • http://kanddrecovery.info/uploads/1/3/1/0/131071095/3100772.pdf
    • http://matt-dana-wedding.com/uploads/1/3/0/6/130604169/vegedad.pdf
    • http://www.bbcbd.com.au/uploads/1/3/0/5/130588744/jeravuwizuwu-kegarijes-fipeb.pdf
    • http://you-beautiful.space/uploads/1/3/0/2/130288462/gedop.pdf
    • http://www.toddstanis.com/uploads/1/3/0/2/130291507/70135.pdf
    • http://bradygazzome.com/uploads/1/3/0/6/130604640/mowogotezusenis-jilewawa-wawurevawe-mofokaxulareje.pdf
    • http://superspahrs.com/uploads/1/3/0/6/130604595/kumepokudasebep.pdf
    • http://ptolemarch.net/uploads/1/3/0/6/130639532/1197178.pdf
    • http://medicalservicesambulance.com/uploads/1/3/0/2/130270902/8161648.pdf
    • http://aipis-edu.org/uploads/1/3/0/2/130272291/tuvupegowusolebofon.pdf
    • http://hostmaster.katherinebaines.com/uploads/1/3/0/4/130476736/tegovawejem.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_off00007a7e.bin
d7aeff6593ec3f3f2d63924a9979a4ac66a32c273e5942a426e8b6823828c2a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A7E 8472 bytes

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