Malicious PDF — malware analysis report

Static analysis result for SHA-256 114dfe4f71f57a59…

MALICIOUS

PDF

32.8 KB Created: 2020-05-17 07:25:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b3b177d6b918d95a9035754f9d95c67 SHA-1: 3b967db3764ff9c928ce4ad6a628655e070fa9e4 SHA-256: 114dfe4f71f57a590480d9fb4fc0caadb298d788e35da8c84c83644e47ee977e
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous external links, masquerading as a CV creation service, which is a common lure for phishing or malware distribution. The ML classifier strongly indicated maliciousness, and the heuristic firings point to a link farm strategy designed to redirect users to potentially harmful content. While no scripts were directly extracted, the embedded URLs suggest the document's primary purpose is to drive traffic to these external sites, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://sdsufiji.com/uploads/1/3/1/4/131483090/131483090.html#gratis+cv+maken+en+en+belgie
    • http://120bennettfoley.com/uploads/1/3/0/6/130604354/nejazimezu_nopijorew.pdf
    • http://cugnette.fr/uploads/1/3/1/1/131164297/f054c1a156bc3.pdf
    • http://kbkornholegames.com/uploads/1/3/0/6/130604366/a0bb80.pdf
    • http://raakcpa.com/uploads/1/3/0/4/130478244/8974658.pdf
    • http://ahnadunnwilder.com/uploads/1/3/1/3/131398110/8397480.pdf
    • http://mamamayimusic.com/uploads/1/3/1/3/131380988/dobigu.pdf
    • http://certifiedklean.com/uploads/1/3/0/2/130272488/6496616.pdf
    • http://fivevapesleft.com/uploads/1/3/0/5/130542781/d7b967c12cef644.pdf
    • http://soundwavesbeachhouse.com/uploads/1/3/0/7/130739328/872045.pdf
    • http://ourrealpurpose.com/uploads/1/3/0/8/130814127/sapafevukodux-fumizebefowid-tolavu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005592.bin
a27f812fba840c41588a5a6f71444ebd4f143bdfa7c77f315853ad6ebe672a61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5592 10276 bytes

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