Malicious PDF — malware analysis report

Static analysis result for SHA-256 c62d47d52937fd7d…

MALICIOUS

PDF

50.3 KB Created: 2020-06-09 07:41:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d0d9e0e9fc95ff997a9e3df8c6602a1 SHA-1: d77bdb9b4c295bab18f07734bd17af237623f4a4 SHA-256: c62d47d52937fd7db442c393239a736b98f92d4b24a01430d44b2c90905d791b
94 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, which suggests a link farm or phishing lure. The ML classifier also strongly indicated maliciousness. The document body contains garbled text but includes a URL that is also present in the heuristics and URL list, reinforcing the link-based attack pattern.

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://bluestonewinery.com/uploads/1/3/1/3/131380210/131380210.html#svt+3%25C3%25A8me+division+cellulaire+co
    • http://guitar-hub.com/uploads/1/3/1/4/131437595/kakosonafa_ruvawa.pdf
    • http://sigridrostad.com/uploads/1/3/0/6/130639071/momibamojudebize.pdf
    • http://coopercountymo.org/uploads/1/3/1/4/131438709/248106875ec27b.pdf
    • http://annemarthewesterbeek.nl/uploads/1/3/1/1/131164497/bd34ba.pdf
    • http://mama.demostation.info/uploads/1/3/0/6/130620451/wezatezob-doxofonumafig-kabitovofuta.pdf
    • http://fortia.co.nz/uploads/1/3/0/7/130740127/6c5b941c3.pdf
    • http://sustainablecircus.org/uploads/1/3/0/6/130639273/6d6665f869d07f9.pdf
    • http://w7.gobeyondthepond.com/uploads/1/3/0/2/130289161/rajodufelubi.pdf
    • http://hostmaster.winscombevillagebakery.co.uk/uploads/1/3/0/8/130815014/525106.pdf
    • http://sophistable.com/uploads/1/3/1/3/131383646/lifozasaj.pdf
    • http://smokepublishing.com/uploads/1/3/1/1/131163856/busetunox-mozemud.pdf
    • http://sydney.awrc.org.au/uploads/1/3/0/6/130604355/7b593c1.pdf
    • http://maincenterz.org/uploads/1/3/0/5/130539295/guverupere-lariga-gewuw-sirorobu.pdf
    • http://hostmaster.winefest.ca/uploads/1/3/0/5/130551399/fbd95cf6a93d3a8.pdf
    • https://widodufe.files.wordpress.com/2020/06/dodexulumop.pdf
    • https://zomurominon.files.wordpress.com/2020/06/tujezu.pdf
    • https://tewopazija.files.wordpress.com/2020/06/51776717953.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_off00009378.bin
db55b4e55cc55262f59c69245e3fca5967c3664fa35c5dfd5a4654d97400dbac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9378 12692 bytes

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