Malicious PDF — malware analysis report

Static analysis result for SHA-256 562b8fdb18599398…

MALICIOUS

PDF

86.4 KB Created: 2021-03-19 10:15:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: d5df34e2ebda01f8b6ad65591f6ba384 SHA-1: 8ec7d97f7dd6c35b367f0622bd3b7c46933c8533 SHA-256: 562b8fdb18599398f572503f9c6f03cbbe1832e0894041477aae8ff5b70ddccc
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable domains, indicating a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The embedded URLs and the document's structure suggest it's designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://lozipotod.ru/strik?utm_term=ley+de+ohm+formula+potencia PDF link annotation
    • http://ribadubeko.scienceontheweb.net/jomijenowezufew.pdfIn PDF document text
    • https://cdn.sqhk.co/fumamimed/jb7g3xm/allo_allo_series_5_episode_15.pdfIn PDF document text
    • http://pofuxubilet.sportsontheweb.net/sample_balance_sheet_format.pdfIn PDF document text
    • https://gadikidaju.weebly.com/uploads/1/3/1/3/131379663/14aeea55d94a3.pdfIn PDF document text
    • https://cdn.sqhk.co/mekaxosur/bgjhhje/mesonu.pdfIn PDF document text
    • https://dibigisilob.weebly.com/uploads/1/3/1/6/131607467/juzof.pdfIn PDF document text
    • https://cdn.sqhk.co/dogutadova/RjgAU97/plants_vs_zombies_movie_download.pdfIn PDF document text
    • http://nepoxiduvilej.scienceontheweb.net/tuba_e_flat_scale_finger_chart.pdfIn PDF document text
    • https://zikemuwebiwolim.weebly.com/uploads/1/3/5/9/135992964/bekesok.pdfIn PDF document text
    • https://cdn.sqhk.co/vanatuwo/ieghaie/bang_bang_bang_just_dance.pdfIn PDF document text
    • https://cdn.sqhk.co/tarolaser/hFM6ALp/bet365_casino_app.pdfIn PDF document text
    • https://xafituku.weebly.com/uploads/1/3/4/8/134863640/417986.pdfIn PDF document text
    • https://toripifisesu.weebly.com/uploads/1/3/4/3/134367164/radadexa-lupow.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://liroporuki.myartsonline.com/gebugigatajuxonerinibi.pdfIn PDF document text
    • http://nitubak.atwebpages.com/985997306.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/sowotipob.pdfIn PDF document text
    • https://s3.amazonaws.com/vogubivajavofu/google_feud_answers_island_of.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_off0001014b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1014B 5140 bytes
SHA-256: 33a41ee76f3dee8f85186202faf0c6899432da9e84756fad85236c121c0182c2
font_01_sfnt_off000112a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112A4 13064 bytes
SHA-256: 0a8eb6dbe004f9f1bb2f2d300bc831714217c94cfcf1fd090a46e49f35f60f57
font_02_sfnt_off00013c9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C9B 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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