Malicious PDF — malware analysis report

Static analysis result for SHA-256 01f9e9dcd724850c…

MALICIOUS

PDF

31.7 KB Created: 2020-03-11 11:14:45 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 6a392790d20719e7910318301f56141c SHA-1: b0d5d4962c2f2705c0888d46a79eb2292fcf50f4 SHA-256: 01f9e9dcd724850cf2f8f3e218f5962c4c3685eb564b9fa05b4be234af80fad0
96 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, a technique often used for SEO poisoning or phishing campaigns. The ML classifier strongly indicated maliciousness, and the presence of numerous links to potentially compromised or malicious domains supports this assessment. No scripts were extracted, but the embedded links themselves serve as the primary attack vector.

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://74-123-72-231.mgwnet.com/uploads/1/3/0/8/130814652/130814652.html#merck+lichrosolv+acetonitrile
    • http://realtalkrealty.com/uploads/1/3/0/6/130604449/010e17.pdf
    • http://104450345337014885.com/uploads/1/3/0/5/130539440/novulibu.pdf
    • http://pacwesteuroparts.com/uploads/1/3/0/7/130739591/9322920.pdf
    • http://ecodesignnest.com.au/uploads/1/3/0/5/130588394/narudunog.pdf
    • http://www.calciomaestro.com/uploads/1/3/0/4/130483142/napiwabosofip-midexubisobaze-wozidafuxi-poroxit.pdf
    • http://rachelskaufman.com/uploads/1/3/0/6/130604279/sapuvolufu.pdf
    • http://jinnyjoestudios.com/uploads/1/3/0/6/130604445/794724f2f.pdf
    • http://ownyourlinemtb.com/uploads/1/3/0/5/130588232/02549a7b.pdf
    • http://eastkentuckytrackers.com/uploads/1/3/0/6/130620232/tawap.pdf
    • http://klaobelllewis.com/uploads/1/3/0/9/130969801/didiz.pdf
    • http://anaquin.org/uploads/1/3/0/5/130541552/2b3a73cb141dc2f.pdf
    • http://startuplunches.com/uploads/1/3/0/5/130589209/c84e31a3.pdf
    • http://www.wythelove.com/uploads/1/3/0/2/130289428/4539061.pdf
    • http://shawngaudiermusic.com/uploads/1/3/0/8/130813395/rivereruxaji.pdf
    • http://nashvillerollingpincompany.com/uploads/1/3/0/7/130739505/zidixasexuxe_pubobubu_kadegutamolo.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_off0000551d.bin
9fa06940908b353c2db9f868f844fc1fc3d186d81444c4a1abcb448bf2eb6501		 pdf-font-stream PDF embedded font (sfnt) at offset 0x551D 6836 bytes

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