Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ddad5c9bba3ac9b…

MALICIOUS

PDF

38.2 KB Created: 2020-03-16 09:23:02 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 9de5b908f0731c244580c0f8327486c1 SHA-1: 220946380f97eee07e702fd9909b7d36e2f56a30 SHA-256: 3ddad5c9bba3ac9bd53d6e30249b2aead14322450c9202e3ea4e3315092ed74f
92 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to similarly structured URLs on different domains. This pattern is indicative of a link farm or SEO spam technique, often used to distribute malicious content or to manipulate search engine rankings. The ML classifier strongly flagged this PDF as malicious, supporting the assessment that these links are intended for harmful purposes. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of specific user lures.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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
  • 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://re-bel.org/uploads/1/3/0/5/130588276/130588276.html#coliform+in+water+levels
    • http://dieseldocdenver.com/uploads/1/3/0/5/130539756/jenim-nuwowis.pdf
    • http://webdisk.staghornridge.com/uploads/1/3/0/4/130489265/f832d52b8c7e07.pdf
    • http://mechproshvac.com/uploads/1/3/0/2/130270938/xinepuneximu_nenoroj_jawewiseroweva_pepawuxaxiduk.pdf
    • http://www.campusentrepreneur.ca/uploads/1/3/0/2/130289495/zobemaw-sazupugifefago-nefal-tidobiwoves.pdf
    • http://singoair.com/uploads/1/3/0/5/130588913/464e8d255.pdf
    • http://foryouxidianka.com/uploads/1/3/0/4/130476276/sixerokulozajilerose.pdf
    • http://evoaccounting.org/uploads/1/3/0/6/130620985/lajufepitazi-xedowi.pdf
    • http://robertsoncountycare.org/uploads/1/3/0/6/130639591/607b245034.pdf
    • http://keeprockevil.com/uploads/1/3/0/8/130874146/xanamarufubekexafut.pdf
    • http://www.tarahasselbeck.com/uploads/1/3/0/8/130874163/8073594.pdf
    • http://louisvillicious.shop/uploads/1/3/0/4/130483110/fejebinu_ligumala.pdf
    • http://ortigroupltd.com/uploads/1/3/0/6/130620709/1693280.pdf
    • http://losstopia.com/uploads/1/3/0/2/130271259/2201734.pdf
    • http://missionbeachaustralia.com/uploads/1/3/0/5/130551143/5d2f451feff4.pdf
    • http://www.bakingwiththebear.com.au/uploads/1/3/0/8/130874194/b7e9808d4121.pdf
    • http://hostmaster.furnitureforrabbits.co.uk/uploads/1/3/0/5/130551941/8523260.pdf
    • http://mlhas.com/uploads/1/3/0/5/130589083/rulawarajasifuxakon.pdf
    • http://blueabydesigns.com/uploads/1/3/0/2/130272472/2f09bd0a2e7a1.pdf
    • http://storageroom-us.com/uploads/1/3/0/8/130814124/8566769.pdf
    • http://regionc.swe.org/uploads/1/3/0/5/130551927/68daa1e72f0e7e1.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_off00006e77.bin
0193329b20ac27dc12ea6e27d2a98ac40cabf17571becd73ff065782a7b1293a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E77 7348 bytes

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