Malicious PDF — malware analysis report

Static analysis result for SHA-256 de2e0ffed574c7aa…

MALICIOUS

PDF

38.9 KB Created: 2020-05-15 07:23:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2812d877d984b9e07cc7ba734b2e63ec SHA-1: e12aee715011c6220188e2071a2dfdd437fc7360 SHA-256: de2e0ffed574c7aad1c828c60f30f5ed6695283ce4074dd767876ad1e3d0d62f
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links to various domains, a technique often used for SEO poisoning or to redirect users to malicious content. The ML classifier strongly flagged this PDF as malicious. The document body, though partially corrupted, contains URLs that are part of this link farm, suggesting the primary purpose is to drive traffic to these external sites.

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://rafterzitstimetogobble.com/uploads/1/3/0/5/130590588/130590588.html#learning+of+excel+sheet
    • http://houseforsalellc.com/uploads/1/3/0/6/130604632/rasenibuluwup.pdf
    • http://brocktonlandscaping.com/uploads/1/3/0/7/130739399/13e5216ed5.pdf
    • http://aramandla.com/uploads/1/3/1/6/131606730/acf8b64bd9bed03.pdf
    • http://glamourblingmagicalthings.net/uploads/1/3/0/6/130604324/jidirojur.pdf
    • http://simrananand.com/uploads/1/3/0/5/130588780/kimevi_wuwidik_tapago_weloneduwo.pdf
    • http://cakesandcandids.com/uploads/1/3/0/5/130540106/7380242.pdf
    • http://grhomebuyer.com/uploads/1/3/1/4/131452816/fd01350e856.pdf
    • http://ricreativemag.com/uploads/1/3/1/3/131384286/zozovexabas.pdf
    • http://alisonic.net/uploads/1/3/0/5/130551302/wuxitakaliw.pdf
    • http://mygypsyrootscatering.com/uploads/1/3/0/4/130435857/jedepifigux.pdf
    • http://endofbench.com/uploads/1/3/1/4/131438729/nabofoz-sivirulasezar.pdf
    • http://aveticunostintenecesare.com/uploads/1/3/0/5/130589217/kijejo.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_off00006d99.bin
ed3849769677c9e77a5cdbe00c4b2a266224385717a66c66327ef01942a3e030		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D99 10276 bytes

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