Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ae65a8c0e820f40…

MALICIOUS

PDF

79.5 KB Created: 2021-03-16 01:56:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 0e8b2e95438b39e482f55bd023c9c33f SHA-1: dc87a7237c39700806ab16134dd2aca814804865 SHA-256: 0ae65a8c0e820f406712aec31dc771a5e4a4cc9ccdeb549c21376145b9937a73
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO poisoning tactic. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. While no scripts were directly extracted, the PDF structure and numerous external URLs indicate an attempt to redirect users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://xajibur.ru/wix?keyword=sg+periodic+table+organization+worksheet PDF link annotation
    • https://kaxogirigajel.weebly.com/uploads/1/3/4/6/134611066/2433519.pdfIn PDF document text
    • https://xuwosanilenerev.weebly.com/uploads/1/3/4/9/134900173/cac6ad.pdfIn PDF document text
    • https://tavadubamik.weebly.com/uploads/1/3/4/4/134473349/topimeraxakuz.pdfIn PDF document text
    • https://rixowumunek.weebly.com/uploads/1/3/5/3/135330445/8a7aafe.pdfIn PDF document text
    • http://leseweremizew.scienceontheweb.net/vajeridodifujepematukina.pdfIn PDF document text
    • https://nizifaweneli.weebly.com/uploads/1/3/4/5/134589853/8555058.pdfIn PDF document text
    • https://serewutedirafam.weebly.com/uploads/1/3/5/3/135339767/957b653e8f0.pdfIn PDF document text
    • https://jefilixepiras.weebly.com/uploads/1/3/2/6/132681342/berilum.pdfIn PDF document text
    • https://mulunumidivopiz.weebly.com/uploads/1/3/5/3/135393794/1231419.pdfIn PDF document text
    • http://kozidozilujivox.getenjoyment.net/how_to_set_up_a_moultrie_mobile_camera.pdfIn PDF document text
    • http://bomisedoxu.mywebcommunity.org/can_t_stop_this_feeling_sheet_music.pdfIn PDF document text
    • https://zojunakalej.weebly.com/uploads/1/3/2/6/132682915/2682332.pdfIn PDF document text
    • http://nijaxubazaziw.mypressonline.com/37993146327.pdfIn PDF document text
    • https://pazisurezufil.weebly.com/uploads/1/3/4/5/134594691/vibudanobariwi.pdfIn PDF document text
    • https://jezinuva.weebly.com/uploads/1/3/4/8/134869759/3dac6e0533f.pdfIn PDF document text
    • https://fojowixejomad.weebly.com/uploads/1/3/2/6/132681658/birerese-vezefiwokubad.pdfIn PDF document text
    • https://zevakevo.weebly.com/uploads/1/3/5/4/135400716/5880e30fd177.pdfIn PDF document text
    • https://nowatipuzovatob.weebly.com/uploads/1/3/5/3/135397830/c3fa0c60c694.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e082cb0d-9c22-4a21-acb7-e2c6127a51d3.filesusr.com/ugd/ff0c06_d7a2c41cefa34d21b467d4e31d4fd183.pdf?index=trueIn PDF document text
    • https://9d349da1-218b-4b59-9e37-2a90cab56d40.filesusr.com/ugd/de9003_ab737ea18a764348bc6551fb0caf4891.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/47e77a20-8505-4421-8da2-e2f900f985e9/can_you_plead_nolo_on_a_felony_in_ga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35f0c4ac-83eb-4797-982c-7a029a16f2e8/totatejez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98bdcd32-2699-45c5-a652-aeaa69a44f33/vizio_sound_bar_remote_code_xbox_one.pdfIn PDF document text
    • https://bb74f61c-7045-47bf-9a7e-968101ee373e.filesusr.com/ugd/81ef4b_e54a4d88b69848ef961c6ce2af42d3f2.pdf?index=trueIn PDF document text
    • https://4c5f53ca-53b4-422e-b335-7d13bdbca5ad.filesusr.com/ugd/e33828_77ce2d30955c4263b2340478e2875693.pdf?index=trueIn PDF document text
    • https://6205d428-d5dc-494e-bbc3-e2236f9d811e.filesusr.com/ugd/6885a6_75623f4bf263409693909ccefd9d3c1b.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C0 5784 bytes
SHA-256: 9e9a9b6fb6d6e9b04c2278b3edd9736b9dc951a0bde26cbe59845575ab45772c
font_01_sfnt_off00010a7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A7E 10580 bytes
SHA-256: c06be952c36a22e5181e883c0fa8d14fd314cf125ae08f9a9162475ebc2d9789