Malicious PDF — malware analysis report

Static analysis result for SHA-256 33e8e0a16084b387…

MALICIOUS

PDF

44.6 KB Created: 2020-03-30 13:03:49 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: dba2b4476d3dd85b9a4afbff73717b35 SHA-1: 17e3c498c7b7110b1dee9ed9216749c7c0884594 SHA-256: 33e8e0a16084b387824abfb36e094e4e500e8e67b4a23550814dac08f4e1b23c
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO manipulation tactic. The primary URL, http://74-123-75-191.mgwnet.com/uploads/1/3/0/3/130379365/130379365.html#where+to+buy+moravian+sugar+cake, is presented in the document body and likely serves as the initial lure. The ML classifier strongly flagged this PDF as malicious, supporting the suspicious nature of the link farm.

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://74-123-75-191.mgwnet.com/uploads/1/3/0/3/130379365/130379365.html#where+to+buy+moravian+sugar+cake
    • http://thepinevilleplayersllc.com/uploads/1/3/0/5/130542922/7669867.pdf
    • http://getyourtanon.com/uploads/1/3/1/0/131071277/3806207.pdf
    • http://wamlcrafts.com/uploads/1/3/0/6/130621870/a9c7772444d.pdf
    • http://cdl4dvd.com/uploads/1/3/0/9/130969695/56c4675ee9b80.pdf
    • http://tamana-color.com/uploads/1/3/0/3/130323286/6589182.pdf
    • http://delreydesigns.co/uploads/1/3/0/5/130550700/xonaruwuvawusafa.pdf
    • http://pamelaschneider.com/uploads/1/3/1/1/131163872/lozusovodoge-tasibuwu-zawaluwufi-xeratakonawavu.pdf
    • http://foundationsblackhistory.org/uploads/1/3/0/7/130775666/5569732.pdf
    • http://hazelcricket.com/uploads/1/3/0/4/130435905/3329273.pdf
    • http://muzayyido.com/uploads/1/3/1/4/131411857/xoxepe-kuvezoga-josizumosomu.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_off000083e2.bin
2ba679c4b14b213e576e7de9dddd5805b6a6c17c710b185e7c439228da12efc1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83E2 8876 bytes

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