Malicious PDF — malware analysis report

Static analysis result for SHA-256 5753fb1b5b8f9e3a…

MALICIOUS

PDF

71.8 KB Created: 2021-03-01 16:37:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 9c59faa8517161b61e5292d0c34b4b88 SHA-1: 952f228c7ec17ee82f63731d5b9db808e3cf954b SHA-256: 5753fb1b5b8f9e3a4d4e8ac80d75ff5a5927f1dd73eacd0b0187d0f0b8d9a5db
244 Risk Score

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/award?keyword=will+there+be+more+six+of+crows+books In PDF document text
    • https://balixilime.weebly.com/uploads/1/3/1/3/131398392/560005.pdfIn PDF document text
    • https://cdn.sqhk.co/benibavagoge/oiijhdw/world_adventures_login.pdfIn PDF document text
    • https://cdn.sqhk.co/felebamifuk/hmieNjg/brilliant_earth_locations.pdfIn PDF document text
    • https://cdn.sqhk.co/fabozesemi/hihXPhg/dafutm_casino_hot_vegas_slot_machines.pdfIn PDF document text
    • http://zesenadozefut.sportsontheweb.net/36705096742.pdfIn PDF document text
    • https://cdn.sqhk.co/navotezive/hcHHihb/voxabovotexanun.pdfIn PDF document text
    • http://vipadobotisituz.mygamesonline.org/primal_blueprint_diet_meal_plan.pdfIn PDF document text
    • http://jaxagogilexet.sportsontheweb.net/swann_security_system_instructions.pdfIn PDF document text
    • https://kodavagimiwebod.weebly.com/uploads/1/3/5/3/135346487/xopabot.pdfIn PDF document text
    • http://interior.estate/how_many_questions_in_frm_level_1835q9.pdfIn PDF document text
    • https://veminimuvaw.weebly.com/uploads/1/3/4/6/134630651/sigewepexifubo-kuxojovero-vuzetub-nixuwemuzagova.pdfIn PDF document text
    • https://lajadarizigatu.weebly.com/uploads/1/3/1/3/131384611/fowitabu_rifomegebi_gelitewinoge.pdfIn PDF document text
    • https://cdn.sqhk.co/feketukadoz/jjjfhc8/traffic_racer_cheats.pdfIn PDF document text
    • https://nutagabe.weebly.com/uploads/1/3/5/3/135325028/jepilolavofuja.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://supuwevul.atwebpages.com/what_are_dapple_dachshunds.pdfIn PDF document text
    • https://s3.amazonaws.com/wusigipufuvowix/mozisiwemu.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_off0000de00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE00 5288 bytes
SHA-256: 75542e35cc7752bee97021bfca836b6445a4f9bc622dc54ac3811537e0ea39b1
font_01_sfnt_off0000eff1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF1 9980 bytes
SHA-256: 2ae4fce1999ae3758897a1a4c937ac03d8248f862580c6e118c3c1053788d3a7

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