Malicious PDF — malware analysis report

Static analysis result for SHA-256 97071513268f3272…

MALICIOUS

PDF

82.8 KB Created: 2021-04-19 13:16:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 293896270586ec8e83c87f3c32c4b052 SHA-1: a91b221f5aa0995ff3c7252e05770dfaf4a00864 SHA-256: 97071513268f327293099ab3320ff5cca68285229b4ff2de8a31ee52d015cdd9
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, many pointing to disposable hosting, indicative of a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. The embedded URLs and the nature of the heuristics point towards an attempt to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://dugedepap.ru/strik?utm_term=chandamama+kathalu+books+in+telugu PDF link annotation
    • https://cdn.sqhk.co/ruzivogawa/jbrjuAS/vr_roller_coaster_app_best.pdfIn PDF document text
    • http://tetupamino.mywebcommunity.org/satujusatobiboso.pdfIn PDF document text
    • https://cdn.sqhk.co/lupobikud/jgeldnM/basic_sales_and_marketing_skills_examples.pdfIn PDF document text
    • http://penafur.scienceontheweb.net/abraham_s_family_tree.pdfIn PDF document text
    • https://cdn.sqhk.co/takejirasomu/bpWhgab/vamadiz.pdfIn PDF document text
    • http://mareson.getenjoyment.net/architecture_books_free.pdfIn PDF document text
    • https://cdn.sqhk.co/navimoxa/iigddhe/77937908838.pdfIn PDF document text
    • https://cdn.sqhk.co/vemosoveveb/haWigOk/25576758315.pdfIn PDF document text
    • https://cdn.sqhk.co/kagaxavog/jgggqic/macroglobulinemia_de_waldenstrom_guidelines.pdfIn PDF document text
    • http://toxipoxekej.medianewsonline.com/business_plan_for_online_shopping_website.pdfIn PDF document text
    • https://cdn.sqhk.co/kowaziwaso/hzifohg/sapimov.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://sujuletabekomus.rf.gd/ppap_manual_5th_edition_free_download.pdfIn PDF document text
    • http://kuwijiti.myartsonline.com/active_and_passive_voice_test_with_answers.pdfIn PDF document text
    • https://6c9aa500-f8d9-42a6-b8a4-5b3c562bbfc3.filesusr.com/ugd/543886_2d0dba6e7e58455283241c6ebb06ba51.pdf?index=trueIn PDF document text
    • https://8084a2ae-6cfb-493d-8155-0d4219c0f7e3.filesusr.com/ugd/5b3528_aa1b9e976b1d42628e33b00cda0c3e0c.pdf?index=trueIn PDF document text
    • http://medojowibapij.epizy.com/86144618259.pdfIn PDF document text
    • http://jifimurosesapu.atwebpages.com/zujemitefebofoze.pdfIn PDF document text
    • http://kugugoroxe.rf.gd/jonizosamoxuwudozo.pdfIn PDF document text
    • https://40fd9d30-e691-4ad4-9ff9-7de67b304886.filesusr.com/ugd/45b27a_368dfeb14c424e358c8f979a3f70a9d8.pdf?index=trueIn PDF document text
    • http://wiwesokowam.epizy.com/does_splat_make_your_hair_fall_out.pdfIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE24 5252 bytes
SHA-256: ac526958e1c68bf92ea42fca8c65602d852b41a61307640c694b6154c59e6a24
font_01_sfnt_off0000efd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD6 5048 bytes
SHA-256: 73fe04bdfe45ec150bafdaaf8682b0059c65455ce6f8260f2211de8e58bfdde7
font_02_sfnt_off000101bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101BD 10956 bytes
SHA-256: fc4ad3321c93a6fb62061a9ff6956ef39637d06a7997cce1ef6a876ca8067d07
font_03_sfnt_off00012777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12777 16164 bytes
SHA-256: e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6