Malicious PDF — malware analysis report

Static analysis result for SHA-256 36fd627f9b8c89df…

MALICIOUS

PDF

52.1 KB Created: 2020-04-23 19:45:11 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d84067415aee4dd1a77bd53084f7f239 SHA-1: 41462c0fed968106a0ba4b340c29cf8f74bcfd31 SHA-256: 36fd627f9b8c89df5debc4908ccf79083756fb92263ec5dd93924fddf3e19d26
94 Risk Score

Malware Insights

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

The PDF document contains a lure promising free Bollywood movies, but analysis reveals it is a link farm. It hosts numerous external PDF links, primarily on the 'mr-charity.org' domain, designed to redirect users to other malicious content. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the link farm behavior.

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://pameladirnberger.com/uploads/1/3/0/3/130323425/130323425.html#free+bollywood+movies++sites+list
    • http://mr-charity.org/uploads/1/3/0/5/130588188/dimaxaxogiri_puwagow_jizupasa_xapolet.pdf
    • http://carlocornelli.com/uploads/1/3/0/8/130813859/d8e10d610.pdf
    • http://lakeoswegochildandfamilycounseling.com/uploads/1/3/1/3/131398368/69cec014.pdf
    • http://networkingpeopleconsulting.com/uploads/1/3/0/7/130740189/67c1b0620c0f602.pdf
    • http://mrclouds.net/uploads/1/3/1/4/131409210/pigapesezenuju.pdf
    • http://alokmani.com/uploads/1/3/0/8/130813654/81dfb85.pdf
    • http://alignpilatesfitness.com.au/uploads/1/3/1/4/131437138/nepenupogak-xuvepigi-vufuxekikowixod.pdf
    • http://federationmarketing.com/uploads/1/3/0/7/130738635/rezor-xatukoxaja-gozejekes.pdf
    • http://promotethecapefear.com/uploads/1/3/0/2/130272877/pobok_fuvowunamavixor.pdf
    • http://thralled.org/uploads/1/3/0/8/130813141/diganax-zafedel-niresoto.pdf
    • http://thenewdope.com/uploads/1/3/0/7/130739351/latolovevebu_nazof_kasawalaxib_futefuxurawo.pdf
    • http://dmd3d.com/uploads/1/3/0/5/130539355/jukuxotomizela-burifumuxi-rurek.pdf
    • http://thenewdope.com/uploads/1/3/0/7/13073
    • 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_off0000a54b.bin
dce88a1b3fec536a9c4c2d3c13535a3b1b2b2211a8e62071a6f46cfbd4ccbc58		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA54B 8020 bytes

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