Malicious PDF — malware analysis report

Static analysis result for SHA-256 11a420bd98b43750…

MALICIOUS

PDF

73.1 KB Created: 2021-02-27 21:49:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: edc333540f321a969fd53cb12a250547 SHA-1: 589f7b60a39a6d92a63291299551069a3a1866dd SHA-256: 11a420bd98b4375007036abbb8f8609bd3b7c22afc8748aa56998e67520d98de
186 Risk Score

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://golowaki.ru/award?keyword=how+to+play+the+guitar+for+beginners+pdf PDF link annotation
    • https://jipowikufimur.weebly.com/uploads/1/3/5/3/135327107/58ce6bd1.pdfIn PDF document text
    • https://bikewodeganesu.weebly.com/uploads/1/3/4/5/134596115/5969048.pdfIn PDF document text
    • https://xonadenot.weebly.com/uploads/1/3/4/6/134685596/xobeve.pdfIn PDF document text
    • https://cdn.sqhk.co/veletafi/heDcLjg/adidas_shoes_sale_black_and_white.pdfIn PDF document text
    • https://pupaxuge.weebly.com/uploads/1/3/4/0/134096873/7116412.pdfIn PDF document text
    • https://cdn.sqhk.co/pixisuja/gibJhhZ/battery_charger_walmart.pdfIn PDF document text
    • https://rilulozopofebu.weebly.com/uploads/1/3/1/4/131406258/dapodew_watejodofi_loniferezimar.pdfIn PDF document text
    • https://cdn.sqhk.co/sopiloroda/higdZjb/jimafipesivufugivas.pdfIn PDF document text
    • https://cdn.sqhk.co/delojiwuguj/86p6yPL/hotels_near_chatsworth_house_with_swimming_pool.pdfIn PDF document text
    • https://zabodoxukuxubar.weebly.com/uploads/1/3/4/9/134904472/1150313.pdfIn PDF document text
    • https://dimomivij.weebly.com/uploads/1/3/4/5/134504604/pigafoja.pdfIn PDF document text
    • https://cdn.sqhk.co/gixezovof/hb1ggeN/13767706535.pdfIn PDF document text
    • https://zorikibezoxima.weebly.com/uploads/1/3/1/3/131384208/tusija.pdfIn PDF document text
    • http://repair-foto.ru/zalifajayn5mh.pdfIn PDF document text
    • https://siwuxamafovad.weebly.com/uploads/1/3/4/4/134489720/f5401bf.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/benubapopikaj/dental_trauma_guide_lateral_luxation.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_off0000df5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF5A 5600 bytes
SHA-256: 8faf8acd7d45d42260b8a24528443ea2d3b2c13c24b488986be502d89e836cd3
font_01_sfnt_off0000f26f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF26F 10764 bytes
SHA-256: c7280f32b9a19a7cb39f0bcd4a2509b93554e0bab211f4452e8be369de7024ed

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