Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d13c32922fb028a…

MALICIOUS

PDF

69.2 KB Created: 2021-03-13 13:56:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 83572dc0bb2db71ae07858a4d86566a5 SHA-1: 739dc4645768dcc3393bab8f807d5f7af82c46ff SHA-256: 0d13c32922fb028a40eeaf09237113831bda901fd5f61f8f759bc966afd8e856
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or SEO link farm attack. It contains numerous external links, with the primary one being `https://druttle.ru/award?keyword=jacques+bainville+petite+histoire+de+france+pdf`. The PDF structure and embedded content suggest an attempt to redirect users to potentially harmful or deceptive websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://druttle.ru/award?keyword=jacques+bainville+petite+histoire+de+france+pdf
    • https://wirimodarezekas.weebly.com/uploads/1/3/5/3/135314182/1073805.pdf
    • https://xowivana.weebly.com/uploads/1/3/0/8/130813667/13516.pdf
    • https://fobopalok.weebly.com/uploads/1/3/4/4/134401292/nutama_losomovojunotez_jogam.pdf
    • https://wewofubajibopa.weebly.com/uploads/1/3/1/3/131381003/josibubupoke-xufinatokaw-donajaxifades-rupedepur.pdf
    • https://nolilozeto.weebly.com/uploads/1/3/5/9/135957670/rixonekix-xerasevun-legame-wipufaro.pdf
    • https://lumewogomor.weebly.com/uploads/1/3/4/3/134319436/putubeloje.pdf
    • https://static.s123-cdn-static.com/uploads/4380707/normal_5fefdd01c77b8.pdf
    • https://static.s123-cdn-static.com/uploads/4459630/normal_6002c2ce68983.pdf
    • https://dobojadu.weebly.com/uploads/1/3/2/7/132711966/motawomaratijekodoni.pdf
    • https://cdn-cms.f-static.net/uploads/4402951/normal_5fe9d6148f07e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://8d59741e-369e-44be-b01e-8fbcb09d2d01.filesusr.com/ugd/7cefa9_b96b140d906849af8367434afdc0a7f2.pdf?index=true
    • https://8eeb1f0a-0cdd-4c66-98a4-83777b49fb54.filesusr.com/ugd/64f9d2_0722224093424a60be640c13dfc9e13b.pdf?index=true
    • https://1ce8651a-bfbb-4b9a-b1bf-24b3b574775a.filesusr.com/ugd/ac72e0_795b4403e8f74e3f9218bbf8e658c2b8.pdf?index=true
    • https://26aaa629-0581-4e25-ae32-a194504e59ab.filesusr.com/ugd/2d4e87_f797117f9fd3419792a1ba0c4000267c.pdf?index=true
    • https://4ef57e19-9a2e-4e6f-a444-f6b59f982a39.filesusr.com/ugd/4c1554_110dcc9386b841908de1704174cc692b.pdf?index=true
    • https://d09251a9-b09e-4077-8ccb-24037f005f7b.filesusr.com/ugd/a6ce17_b1d57785aaa24eb7a6fc8f0e7ef4b716.pdf?index=true
    • https://uploads.strikinglycdn.com/files/1a9b3056-f8d7-4eca-b4f5-52c8b25c194b/how_do_you_cook_ribs_on_a_pellet_smoker.pdf
    • https://2ed821ec-8078-4e74-b11b-c5cec6a88262.filesusr.com/ugd/65e777_2288cd948ee84a46a9293d479b58a4bb.pdf?index=true
    • https://uploads.strikinglycdn.com/files/f6b8e530-c923-4f7b-b04d-a2a0fb94ff39/tupopegeneralulero.pdf
    • https://uploads.strikinglycdn.com/files/3e1d7ef6-2c54-422d-8aa5-36dbbceac466/38056150055.pdf
    • https://1f571a09-6495-4108-bd1a-9715deae29b5.filesusr.com/ugd/b0bf26_4708b44cccf6424eba7d3c37e174133d.pdf?index=true
    • 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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf24.bin
a23c605dd19cf00a922f8f6b984323fb49f97364568c2fecc62c6dc0b1fd6d29		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF24 5560 bytes
font_01_sfnt_off0000e200.bin
39cd9152da64bbe00462607a9285c907013fe3448b5ab2f51fe4c892a1e2f17a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE200 10724 bytes

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