Malicious PDF — malware analysis report

Static analysis result for SHA-256 75211ca01f7ffa32…

MALICIOUS

PDF

36.9 KB Created: 2020-04-04 08:11:26 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: df9fb469db9c734be0239d70265e2d2d SHA-1: 205102ef66339fff6da10c9ab451e899add77747 SHA-256: 75211ca01f7ffa320261f31158a6bd9d3c10f92b1b77e1caa1a2edf096445d3b
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to other PDF files hosted on various domains. This behavior is indicative of a link farm or SEO spam campaign, designed to drive traffic to potentially malicious sites. The ML classifier strongly supports the malicious nature of this PDF. 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://togglesbottles.com/uploads/1/3/0/4/130477293/130477293.html#fundicion+en+molde+permanente+por+gravedad
    • http://bkgroupbenefits.com/uploads/1/3/0/8/130813416/fedomobami.pdf
    • http://taitonstouchjewelry.com/uploads/1/3/0/7/130738831/tisofuxamimozotugogi.pdf
    • http://kylesj.com/uploads/1/3/0/6/130621511/0cf77f1.pdf
    • http://solutionxpertconsultants.com/uploads/1/3/0/8/130814631/1f4e39f1.pdf
    • http://takeatriprentals.com/uploads/1/3/0/2/130271028/nagazazuzow_jarelafid_ponix_widinamaweno.pdf
    • http://passmankade.com/uploads/1/3/0/3/130324027/xudixum_susuruk_pufuw.pdf
    • http://testlively.com/uploads/1/3/0/7/130740073/togax-rizadezezekug-zovasidulevob-tiguko.pdf
    • http://schoolofbeatbox.net/uploads/1/3/0/6/130621686/sotekurifevi.pdf
    • http://sugarheal.com/uploads/1/3/0/4/130483817/buzel-mujewafiraloz-wuvivib-newevuledowus.pdf
    • http://dna-testi.net/uploads/1/3/0/2/130289218/12aa7044e22.pdf
    • http://selinapeason.com/uploads/1/3/0/4/130488583/fekurepe.pdf
    • http://rainboascales.com/uploads/1/3/0/5/130589054/nuvilitavumu.pdf
    • http://giendesign.com/uploads/1/3/0/9/130969686/jemopiser.pdf
    • http://sebastiangardner.com/uploads/1/3/0/6/130604093/450754.pdf
    • http://lauranozicka.com/uploads/1/3/0/4/130435738/8586634.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_off000067da.bin
7383c2a7849f111ae004a02868e6743dde596ecce06bc53d9044064b1ec9ccef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67DA 7800 bytes

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