Malicious PDF — malware analysis report

Static analysis result for SHA-256 69592bcbf14a5517…

MALICIOUS

PDF

43.0 KB Created: 2020-03-09 01:59:28 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b3aa972701edd47370ddd030da9f2459 SHA-1: 349b75ba83bc2e424988d94e4b6b4d50ff107452 SHA-256: 69592bcbf14a551753eb215859cd03d4692b2c6e1a60a6d43d41a0c7ad30d982
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 redirection to malicious content. The ML classifier also strongly indicated maliciousness. The embedded URLs point to various domains hosting PDF files, likely part of a campaign to distribute malware or engage in SEO abuse.

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://kbhxw9fu.brdge.org/uploads/1/3/0/6/130639453/130639453.html#sindrome+del+espectro+alcoholico+fetal
    • http://swankyfork.com/uploads/1/3/0/5/130588674/gopuwe.pdf
    • http://tikkie-thaikjokken-catering.com/uploads/1/3/0/7/130738633/nipijemugezilewebale.pdf
    • http://uaerecords.com/uploads/1/3/0/9/130970014/15ad7cb.pdf
    • http://dreamweaverdr.com/uploads/1/3/0/2/130287995/6037241.pdf
    • http://norwichmedievalmysteryplays.com/uploads/1/3/0/3/130323235/wekolubedatodisuwon.pdf
    • http://emmashelpinghands.net/uploads/1/3/0/5/130543656/tizabi.pdf
    • http://txkicks.shop/uploads/1/3/0/5/130538859/jazetofopumasuko.pdf
    • http://thepioneercrafthouse.org/uploads/1/3/0/3/130379431/rejuvobonow.pdf
    • http://nancyfleuridor.com/uploads/1/3/0/4/130477335/7161375.pdf
    • http://desertskydoodles.com/uploads/1/3/0/7/130740013/9b181e9.pdf
    • http://bengreenaway.org/uploads/1/3/0/4/130483338/pezepofo_kofujudabewi_jafaguf_fejekovitilid.pdf
    • http://motortrainingtotaal.com/uploads/1/3/0/6/130639665/68870981ab1d.pdf
    • http://estrategiadecontenidos.com/uploads/1/3/0/4/130489467/34162fc27ed.pdf
    • http://newhereiam.com/uploads/1/3/0/6/130640132/1201055.pdf
    • http://vca1988.org/uploads/1/3/0/7/130738988/1c1d6d7e.pdf
    • http://pilateshighfields.com/uploads/1/3/0/5/130551692/kewige.pdf
    • http://empowerforimpact.com/uploads/1/3/0/5/130590420/462290.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • https://medlineplus.gov/spanish/fetalalcoholspectrumdisorders.html
    • 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_off00007da8.bin
ff026f055ecfd0fea820ca0dd6b35f73e8736cb001a84f90ab96ce8452f7eb8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DA8 8680 bytes

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