Malicious PDF — malware analysis report

Static analysis result for SHA-256 22966dbfc79356e9…

MALICIOUS

PDF

74.4 KB Created: 2021-02-28 14:02:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 88abac05b80890694722cf4b47c4ca30 SHA-1: f2a277c781231b997a9d208a2a1fc11315fea4bd SHA-256: 22966dbfc79356e96aecc844cc99202356a4dc972b8361b0d998b1363c9b1005
186 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to disposable domains and potentially malicious content, characteristic of a link farm used for distributing malware or conducting phishing campaigns. The presence of numerous external links suggests an attempt to redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/wix?keyword=the+man+in+the+mirror+poem+printable PDF link annotation
    • https://cdn.sqhk.co/temirikuji/cgheWkX/all_today_soccer_football_games_prediction.pdfIn PDF document text
    • https://gixebodaloru.weebly.com/uploads/1/3/1/3/131379223/971305.pdfIn PDF document text
    • http://gidpopiteru.com/woredetujigitasoxexilev6its.pdfIn PDF document text
    • https://cdn.sqhk.co/litawoxelida/jhgiXji/abba_greatest_hits_vol._2_album_cover.pdfIn PDF document text
    • https://cdn.sqhk.co/kibizatududo/KPhfic6/salivojum.pdfIn PDF document text
    • https://lebotowim.weebly.com/uploads/1/3/1/4/131438344/kizaxumip.pdfIn PDF document text
    • https://cdn.sqhk.co/rujiwujik/jhK3TCf/vanilla_cake_recipe_without_butter_and_baking_powder.pdfIn PDF document text
    • http://fruit-citrus.space/xotawaluvibupirobiden4naxg.pdfIn PDF document text
    • https://cdn.sqhk.co/luwokiseg/iAgfjdZ/halloween_party_ideas_for_families.pdfIn PDF document text
    • http://topcabinets.xyz/beboncool_bluetooth_controller_manual1ayy3.pdfIn PDF document text
    • https://xifepifedezuz.weebly.com/uploads/1/3/4/4/134495844/ragapomopam.pdfIn PDF document text
    • http://helpforteam.com/ethical_hacking_seminar_ppt_freemeepr.pdfIn PDF document text
    • https://buxijoxusezo.weebly.com/uploads/1/3/1/4/131483018/zerizekevo-xuxep-vokorotuvavu.pdfIn PDF document text
    • https://tunibedexorole.weebly.com/uploads/1/3/5/3/135350281/7036345.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/segmentos_y_cavidades_del_cuerpo_humano.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/formatting_json_file_in_notepad.pdfIn PDF document text
    • https://s3.amazonaws.com/wujixus/85023057294.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_off0000e7f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F5 4968 bytes
SHA-256: ee7a5450f1055fc92451a2051c4ba593e3e9dc4f20f2198e49bcd48762e69e98
font_01_sfnt_off0000f8a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A4 10380 bytes
SHA-256: cb2588efa870f673bcb762e7a1ceb53de9f8f76766954724af66f3f813157691

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