Malicious PDF — malware analysis report

Static analysis result for SHA-256 008a86ebba305d1a…

MALICIOUS

PDF

33.7 KB Created: 2020-03-17 16:14:02 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 4ec079a9bfc675ec35388985633e2806 SHA-1: bbb75f0620abcf6079d0aae9d89da63ba8ab94e6 SHA-256: 008a86ebba305d1a3e80816583abe068080c7619addfa3d3fcc8e536f13e49d3
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, as detected by the PDF_SEO_LINK_FARM heuristic. The ML classifier also strongly indicated maliciousness. The document body, though partially obfuscated, contains references to a user manual and URLs that are likely part of a link farm or a distribution mechanism for further malicious content.

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://marikacleaningservice.com/uploads/1/3/1/0/131070255/131070255.html#aastra+9316cw+user+manual
    • http://www.doeatjangkir.com/uploads/1/3/0/5/130546486/kavav.pdf
    • http://mindbodsoul.com/uploads/1/3/0/4/130436337/xanido-juwugerepewe.pdf
    • http://fightinaddiction.com/uploads/1/3/0/7/130775244/jifovivo.pdf
    • http://monroeusa.com/uploads/1/3/0/3/130313010/995538.pdf
    • http://www.nahnsen.de/uploads/1/3/0/2/130287886/8effb33f516fe.pdf
    • http://www.pmpclones.com/uploads/1/3/0/8/130814118/rafufogot_nafunatugatawu_fuzunifijotatab.pdf
    • http://hostmaster.hjs-coffee-service.nl/uploads/1/3/0/5/130540065/1858517.pdf
    • http://staceymbrown.com/uploads/1/3/0/5/130551015/pupaneranevebu.pdf
    • http://cattywhompus.net/uploads/1/3/0/7/130776769/c8c361.pdf
    • http://hulkimatum.net/uploads/1/3/0/6/130639956/7464070.pdf
    • http://www.theestatesflorida.com/uploads/1/3/0/4/130489363/xaxonijuwag.pdf
    • http://itssewcutely.com/uploads/1/3/0/5/130543065/4c4c662.pdf
    • http://www.spencerwilliamsdesigns.com/uploads/1/3/0/4/130489475/404503.pdf
    • http://danielgann.com/uploads/1/3/0/2/130270804/xuvafavakod_dipumulatafil.pdf
    • http://www.paymentcardsettlementclaim.com/uploads/1/3/0/2/130291582/fexaj.pdf
    • http://www.back2balancecaninemassagetherapy.com.au/uploads/1/3/0/7/130775368/d5fb665351eabdb.pdf
    • http://ip121-colo.mnemonix.com/uploads/1/3/0/2/130288465/319b2.pdf
    • http://learnized.com/uploads/1/3/0/2/130272474/e001e87.pdf
    • http://cookiesbykae.com/uploads/1/3/0/6/130604176/2232817.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_off00005ca0.bin
701a4e050439434829a78ce25ecfc73f07baf4d45a92baa4b7f8048051be1699		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CA0 7216 bytes

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