Malicious PDF — malware analysis report

Static analysis result for SHA-256 8041357df8caf184…

MALICIOUS

PDF

38.8 KB Created: 2020-03-21 11:31:54 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 29702739d1f63762745698e95fd80bea SHA-1: a2089ae8a26cf0bb1e9a40027915805e9d8f97bc SHA-256: 8041357df8caf184a7b3a17ae6041b9c346c90196dd40e5f47c3210dcae4e3a6
96 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The embedded document body text, though partially corrupted, also contains a URL that points to a similar domain structure. These links likely serve to manipulate search engine rankings or redirect users to malicious content. No scripts were extracted from this sample, but the sheer volume of external links suggests a malicious intent to drive traffic or host further malicious content.

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://nationalfootballcheerleadersalumni.org/uploads/1/3/0/6/130605504/130605504.html#pubertad+y+adolescencia+cambios+psicologicos
    • http://www.appliedintegrativeenergyhealing.com/uploads/1/3/0/6/130604640/ruvogadiras-gukasapiduxapa-natek.pdf
    • http://exploringjack.com/uploads/1/3/0/8/130873906/3320413.pdf
    • http://berryflats.net/uploads/1/3/0/4/130476313/6084720.pdf
    • http://veteransmusicfest.com/uploads/1/3/0/7/130740504/961886.pdf
    • http://timothysmithactor.com/uploads/1/3/0/5/130551299/3999272.pdf
    • http://oncallathletics.com/uploads/1/3/0/8/130813428/9b321f5.pdf
    • http://www.bodiedbyshalee.com/uploads/1/3/0/6/130603761/3121362.pdf
    • http://webmail.thollfence.com/uploads/1/3/0/7/130776017/9035538.pdf
    • http://alphathenooby.com/uploads/1/3/0/9/130969580/6836629.pdf
    • http://theejollyjolie.com/uploads/1/3/0/5/130589057/501cdfc947937.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_off00006ea9.bin
db45bb1099b8f77d0f383d73e8e166c565f3190288de4b3e4e16a3fe1e1fef73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EA9 8168 bytes

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