Malicious PDF — malware analysis report

Static analysis result for SHA-256 90bd40fea080e692…

MALICIOUS

PDF

38.9 KB Created: 2020-03-28 07:18:27 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c4aaf5e547847b944edeea649fd08fea SHA-1: 471cdc53506b8a131d9231c7bc7aa16769e0d4d1 SHA-256: 90bd40fea080e692bd0e5553e060257ef550b41d6c2be84229265b34f312d21d
94 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The document body also contains a prominent URL that appears to be a lure for pirated movie content. This suggests the primary purpose is to act as a link farm, potentially for SEO manipulation or to distribute further malicious content via the linked PDFs. No scripts were extracted from this sample.

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://fromelsewhere.agency/uploads/1/3/0/5/130538995/130538995.html#ice+age+2002+full+movie+in+hindi+free+download+mp4
    • http://peggydahlbartunek.com/uploads/1/3/0/6/130604547/7365065.pdf
    • http://betathetadelta.com/uploads/1/3/0/9/130969831/bemetuxivo.pdf
    • http://cantortradegroup.com/uploads/1/3/0/4/130479044/5431316.pdf
    • http://www.nashyhealthcareltd.co.uk/uploads/1/3/0/8/130874521/fofuvirawilu_besojomumeti.pdf
    • http://theshaversclub.com/uploads/1/3/0/6/130639651/sirekevipovuwin.pdf
    • http://hyeawonkim.com/uploads/1/3/0/7/130739498/2524380.pdf
    • http://hispanicaccessfoundation.org/uploads/1/3/0/5/130551294/muwel.pdf
    • http://fromtheheartllc.org/uploads/1/3/0/2/130288534/6856706.pdf
    • http://reykjaviksamples.com/uploads/1/3/0/2/130288488/subenodudabapa.pdf
    • http://mailserver.annemiekvanlier.nl/uploads/1/3/0/2/130272513/devof.pdf
    • http://www.scmegale.com/uploads/1/3/0/7/130776676/mepudenukizubevede.pdf
    • http://safecitysecurity.com/uploads/1/3/0/2/130289320/zololarum.pdf
    • http://coltsound.com/uploads/1/3/0/4/130435590/kevanuxodagufu.pdf
    • http://www.benbodnarfilms.com/uploads/1/3/0/6/130621788/bexakase.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_off00006ef9.bin
b403a61c8cc71ee4f244275e4531ceed7aeb4eceb53f1199eda282f41655311b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EF9 8108 bytes

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