Malicious PDF — malware analysis report

Static analysis result for SHA-256 92fc1b326b7ac6ce…

MALICIOUS

PDF

77.5 KB Created: 2021-04-18 13:14:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 983c77dd4dcc37edfb7f6ec276355166 SHA-1: 2509fa87c068a5b00ff40817f949887a38c5c73d SHA-256: 92fc1b326b7ac6ce93e0ba8d000cd95918b980f0ab70d900c358aada82c7adcc
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier, with ClamAV detecting it as a phishing trojan. It functions as a link farm, containing numerous external URLs, with at least 30 links detected. The primary malicious URL identified is `https://jottigo.ru/strik?utm_term=animator%2527s+survival+kit+walk+cycle`, which likely leads to a phishing page or malware download. The presence of embedded URLs and the link farm structure suggest an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 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://jottigo.ru/strik?utm_term=animator%2527s+survival+kit+walk+cycle PDF link annotation
    • https://jagavovukivotu.weebly.com/uploads/1/3/4/8/134881855/28608.pdfIn PDF document text
    • https://novuwujuvum.weebly.com/uploads/1/3/0/7/130776589/bavavowafowugon_nugukulijugad_nagejazi.pdfIn PDF document text
    • http://lessonsonline.site/matotaminajesolte0r6.pdfIn PDF document text
    • http://look-hotel.com/mifaforef3kp2t.pdfIn PDF document text
    • https://mufuxavezefajox.weebly.com/uploads/1/3/4/4/134497947/nonabowotudu.pdfIn PDF document text
    • https://befewegumezozem.weebly.com/uploads/1/3/1/4/131453636/1d61b617ab61a3b.pdfIn PDF document text
    • http://strgb2.ru/wotisejuph4vga.pdfIn PDF document text
    • http://businesslinecenter.com/canon_pixma_mx922_support_code_b200pi230.pdfIn PDF document text
    • http://usechambre.xyz/94722553314h9t3t.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/24d3999a-4e67-4528-9237-76a5453fcab1/fusadutibusosud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95b7b5eb-49a4-48d1-82dc-35fba6297cd1/71509026062.pdfIn PDF document text
    • https://973697ad-ffa4-4f9d-85cd-0c9d1ea039ee.filesusr.com/ugd/5f5755_6b014edaf6044047ba892ad3485b4764.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdbfb3e4-c07a-4d18-b3c4-cb13de64a531/tekonsha_prodigy_p2_trailer_brake_controller_review.pdfIn PDF document text
    • https://b46c4cda-4951-41c0-816f-bbf02eee4d9b.filesusr.com/ugd/4ff992_8d9563bd6d674a47886585ebe01f2414.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6576dc6-35e3-47ee-ba15-d8b1f6dabb9b/jordan_belfort_wiki_fr.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5135cbf7-da2b-490a-82b8-e8e3b10b3436/force_holding_atoms_together_in_compounds_is_called.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/738d9c1e-0e64-43ae-88c2-36bef77e2c25/gadavofajazoderal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3766b48e-f067-4530-9368-435d9512be63/26032405338.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f7dc88f-a5f6-464e-9b84-20464029a4e3/boxavadifetagoxotiguwefu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b4351c4-4d1c-4897-91b2-3019745e4bf9/foundations_of_lodging_management_2nd_edition_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90c6bcf0-6106-4ee4-ac2e-023e952e6864/how_to_clean_the_drum_unit_on_brother_printer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6028fe8-8fdb-406c-997e-1abf36a10301/nupuwa.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0BB 5284 bytes
SHA-256: 16661f7769de689199de04336ff58a1c109deb1d6cdf8376b8b17eb1e7e9b39e
font_01_sfnt_off000102be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102BE 11088 bytes
SHA-256: 36b897a918e142b8471e4623c69f811e28a45fe57c0b883f18af0a7d8aea8fd6

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