Malicious PDF — malware analysis report

Static analysis result for SHA-256 95f4887901018aa6…

MALICIOUS

PDF

77.0 KB Created: 2021-05-09 01:41:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 48c7e1aaa8870359eec2e31c5b9a0106 SHA-1: 286d7376bf29efd2fbbf758846f6af5ad8fd5a10 SHA-256: 95f4887901018aa6775a84f656b9c1756e8967049af044adac3b5b5b3d8c04a3
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, indicating a link farm designed to redirect users to potentially malicious content. ClamAV detection and ML classification strongly suggest malicious intent, likely for phishing or malware delivery. The presence of external URIs and the link farm heuristic point towards an attempt to direct users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/strik?utm_term=canon+ae-1+rewind+button+stuck PDF link annotation
    • https://cdn.sqhk.co/futevanu/ihYuNhg/tofikoparinowolixagex.pdfIn PDF document text
    • http://lisolu.org/75686927757kaoeo.pdfIn PDF document text
    • http://fbdirect.site/kuzorovm3wb.pdfIn PDF document text
    • https://cdn.sqhk.co/badexejos/ijcIjcS/983106266.pdfIn PDF document text
    • http://laketofetujeso.medianewsonline.com/31375661905.pdfIn PDF document text
    • http://vukuradi.mygamesonline.org/bone_marrow_failure_syndrome.pdfIn PDF document text
    • http://sollabs.xyz/476297336228dgw3.pdfIn PDF document text
    • http://medebupima.sportsontheweb.net/sinuwanererajejajaxiwelej.pdfIn PDF document text
    • http://libuwapuvewipev.mywebcommunity.org/how_many_questions_in_70-761_exam.pdfIn PDF document text
    • https://cdn.sqhk.co/lowanivari/hjcgdgg/32007689163.pdfIn PDF document text
    • http://teplotronic.ru/sosovab4h7m8.pdfIn PDF document text
    • https://cdn.sqhk.co/jebumujo/LFsjbig/my_bitcoin_address_btc_wallet_is.pdfIn PDF document text
    • https://cdn.sqhk.co/tinulafi/chdW2Zp/18646730681.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9f1be152-2ea1-4306-981d-bfff62ad382d.filesusr.com/ugd/08fb22_37be3c75a34741f6a4101f1ea15b9783.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/82f8123b-00a8-4132-a009-a323c88cd845/jesus_mi_fiel_amigo_abel_zavala_letra_y_acordes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15b1fc4f-238c-406f-a585-23f4623837cc/spalding_44in_gametime_basketball_system_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f83c01c-3076-4f68-999e-f55357ca350d/lexuzi.pdfIn PDF document text
    • https://40fd9d30-e691-4ad4-9ff9-7de67b304886.filesusr.com/ugd/45b27a_78b2bbae331c4aa78dfea3eb1670f371.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d87310f-d8a8-4570-9aa4-711c830d76c5/schaums_outlines_statistics.pdfIn PDF document text
    • https://2225f16e-b6a0-48e2-a067-d7e802b71dd4.filesusr.com/ugd/a7ada4_07f037d6feb54121942ae9a1e84df3fc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/abfd2572-9b9a-41a7-b404-f5cb7b54390b/17038724317.pdfIn PDF document text
    • https://8eeb1f0a-0cdd-4c66-98a4-83777b49fb54.filesusr.com/ugd/64f9d2_a0ee802e34e44349afebf3d9b6726562.pdf?index=trueIn PDF document text
    • https://ee897e78-a157-4eb5-8a47-d615096087a2.filesusr.com/ugd/113e89_20c234c0f3ca4e658e1cf768e6e46129.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_off0000f155.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF155 5184 bytes
SHA-256: ee76d461244990715a1d56b0630a4d5f5252fda19f696989bfd2171935783341
font_01_sfnt_off00010323.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10323 10396 bytes
SHA-256: 4cad1d2f48bd4af9488952cac3441525f49352b0ff926cbfba8e3b9f87aaa206

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