Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dc96200a8392d57…

MALICIOUS

PDF

113.9 KB Created: 2021-03-07 11:12:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b877d0b9894da455411f2b2aa2d3a380 SHA-1: 5962da4bb407310ee878e92ca0e5733d1a74c9fd SHA-256: 5dc96200a8392d57adf2a315dfda8414fc6023056288c83b13fdfa630b995d98
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://leonvi.ru/aws?utm_term=the+magic+flute+synopsis+pdf PDF link annotation
    • https://cdn.sqhk.co/mapibeze/ghgghgh/zombie_fighter_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/simikitivo/hjchhNU/rilujimir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375908/normal_600a068aeecbb.pdfIn PDF document text
    • https://poxapoxidofex.weebly.com/uploads/1/3/4/0/134016688/fusasojin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464878/normal_602da74b4d183.pdfIn PDF document text
    • https://cdn.sqhk.co/supopareso/ihw6G6L/spider_man_venom_marvel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409992/normal_6023c6d9f1ed4.pdfIn PDF document text
    • https://dojiladise.weebly.com/uploads/1/3/1/3/131379401/b4933.pdfIn PDF document text
    • https://cdn.sqhk.co/fatobaliv/Iidjawv/chop_chop_slices_game.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388841/normal_5fcdce175dcc3.pdfIn PDF document text
    • https://jalusuduzewot.weebly.com/uploads/1/3/1/4/131456012/giduwegu_lonitilu_pepoxi.pdfIn PDF document text
    • https://fosuzotarodaduv.weebly.com/uploads/1/3/4/3/134391180/c80cd4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485926/normal_5fe150ee6895b.pdfIn PDF document text
    • https://cdn.sqhk.co/kupodakojav/ctcgfcC/data_analysis_process_in_qualitative_research.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498997/normal_603f2b6970d33.pdfIn PDF document text
    • https://cdn.sqhk.co/jotepomi/fwNspvY/2048_hexagon_game_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423195/normal_5fd788281be7a.pdfIn PDF document text
    • https://xepevuke.weebly.com/uploads/1/3/0/7/130775471/gagav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485010/normal_60268db9bd88e.pdfIn PDF document text
    • https://cdn.sqhk.co/bizujonad/lhhLibs/bad_traffic_accident_today.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/7c012245-cad6-48be-996a-beee163ad8fc/98886427373.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a6c236e-d1cb-4db9-a3d2-f4f3d6840c32/28860944521.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6035c9bb-9caa-4acf-8fc5-7ba4118a201b/papari.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/605baf8d-7d43-43b3-a1ef-6f9a00bb9feb/human_resource_management_ppt_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cc809e7-593d-4de1-9cc0-e2bf1f250287/jelopelo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016f94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F94 2828 bytes
SHA-256: 2f32373152b86590eb5c993bf8dbb57d20fc33770b92bc1ec6b5fd985d660553
font_01_sfnt_off0001799d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1799D 5524 bytes
SHA-256: ed080398f169519e2bebf9c6d78cc81eb4be4eecb2f69e141f47b9f26cae8fbd
font_02_sfnt_off00018c53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18C53 13032 bytes
SHA-256: 5a681fccab89f998ad19d8bfd9c02f36aea26944aacade241540482058630bd6