Malicious PDF — malware analysis report

Static analysis result for SHA-256 b47184b54cb1f47e…

MALICIOUS

PDF

36.8 KB Created: 2020-03-11 11:59:29 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: cfd6bf158626d14b92024e1819579f79 SHA-1: 4851d079f89789f6346f91d7d2fe9493c4a1a93a SHA-256: b47184b54cb1f47eb672f7451e38e8cb5461d61c34e750f905524f0ecdda8246
94 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body also contains embedded URLs, including one that appears to be a lure related to 'continental drift and plate tectonics'. The primary function appears to be directing users to a network of websites, likely for malicious purposes such as phishing or distributing further malware.

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://huifengguojiyulehuisuo.br3h.com/uploads/1/3/0/2/130291779/130291779.html#what+are+some+differences+between+continental+drift+and+plate+tectonics
    • http://store.groennfell.com/uploads/1/3/0/6/130621691/cbc581c1bd.pdf
    • http://cugnette.fr/uploads/1/3/0/4/130489070/31865.pdf
    • http://bulldoggcapital.com/uploads/1/3/0/3/130379194/kefubimolukub.pdf
    • http://theheroinesclub.com/uploads/1/3/0/7/130776298/bilepurukarove.pdf
    • http://bphouseplans.com/uploads/1/3/0/7/130738635/jaxudojajewegekuson.pdf
    • http://annearundelhandcenter.com/uploads/1/3/0/6/130621814/8788191.pdf
    • http://robertsragdolls.com/uploads/1/3/0/4/130488500/5e531.pdf
    • http://saomaianh.net/uploads/1/3/0/2/130272636/xipiraje-jinusaguwepubu.pdf
    • http://rvac.biz/uploads/1/3/0/8/130874320/dulorujokuko-pufodonubo-nixopaka-jubilisisum.pdf
    • http://creativbordum.com/uploads/1/3/0/7/130740000/sabume_xixizupolufipi_nojipujebitune.pdf
    • http://capssinc2.org/uploads/1/3/0/3/130313249/90004145c.pdf
    • http://thegallerybychristina.com/uploads/1/3/0/2/130289226/xibaresiju.pdf
    • http://hotwokrestaurant.co.uk/uploads/1/3/0/6/130605152/3eafc0bd805.pdf
    • http://moniqueyin.com/uploads/1/3/0/3/130379351/f787d075.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_off00006775.bin
abcad799a7c050a9a85d1bf7a0781a0052d7f8096500dc50581cb0217f794fae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6775 7668 bytes

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