Malicious PDF — malware analysis report

Static analysis result for SHA-256 4690db286697d1f7…

MALICIOUS

PDF

34.4 KB Created: 2020-05-24 11:06:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1463da46622911a70e7169fa3f83984d SHA-1: 8a3036f0835ceec04618349e1a9a8edd820f46a5 SHA-256: 4690db286697d1f7ee8d4329cd9b789ddf79de042bed4d466e3dea297ff24367
94 Risk Score

Malware Insights

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

The PDF document contains a large number of external links to various domains, identified by the PDF_SEO_LINK_FARM heuristic. The embedded document body text, though partially obfuscated, also contains URLs that are part of this link farm. This suggests the primary purpose is to drive traffic to these external resources, potentially for SEO manipulation or to serve as a distribution point for further malicious payloads.

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://lq.undesirable.us/uploads/1/3/0/5/130588230/130588230.html#nonton+film+tattooed+flower+vase
    • http://littlepuddle.biz/uploads/1/3/0/3/130379769/b17ae752467c5c.pdf
    • http://systemy-szklane.eu/uploads/1/3/0/5/130590637/09e38f01f790.pdf
    • http://likethepresident.com/uploads/1/3/0/2/130270924/sojejiji_gaxasigiwiko_kavuxekowu.pdf
    • http://myiph.org/uploads/1/3/1/1/131164297/e7c014cc4bfa03.pdf
    • http://beepboopshow.com/uploads/1/3/0/5/130550742/kasakaf-zugubol-tewugileminogig.pdf
    • http://rope.education/uploads/1/3/1/8/131856040/3320956.pdf
    • http://sanphamnovaland.com/uploads/1/3/1/4/131407179/libuxoze.pdf
    • http://surgis.net/uploads/1/3/1/6/131636988/933c5.pdf
    • http://utahtelephoneman.com/uploads/1/3/0/3/130324370/jupeg.pdf
    • http://rebeccapickens.com/uploads/1/3/0/4/130475877/c65bbb4b6992.pdf
    • http://revcapitalgrp.com/uploads/1/3/1/6/131637149/1c2471fccfa8b6c.pdf
    • http://everydaymemories.org/uploads/1/3/0/7/130776420/ee317196264.pdf
    • http://aquadandiyalonga.org/uploads/1/3/0/8/130814286/3885772.pdf
    • http://fairdealengineering.com/uploads/1/3/0/5/130539922/e627b121e1e2a5.pdf
    • http://tlsdesigns.shop/uploads/1/3/0/4/130483978/jurapixilubi_zojulomeb.pdf
    • http://losangelescue.org/uploads/1/3/0/8/130874322/3367992.pdf
    • http://gembabyrental.com/uploads/1/3/0/6/130639059/werod_jupukev.pdf
    • http://herteapot.com/uploads/1/3/1/4/131453246/8868325d09.pdf
    • http://rachsrm.com/uploads/1/3/0/2/130272548/1981770.pdf
    • http://coachesse.info/uploads/1/3/1/8/131856813/gomamawajumu.pdf
    • http://schoolisthebest.solutions/uploads/1/3/0/4/130436018/kilanor_defozitoxugaven_ledoladugupak_xewum.pdf
    • http://uxcpro.com/uploads/1/3/0/5/130590564/3986189.pdf
    • http://bucyfortexas.org/uploads/1/3/0/5/130588597/505028.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_off00005832.bin
1298608dbd9cf177c19d744d020b3b4cdd8a100393d57df64f46531b4a27168e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5832 10672 bytes

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