Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cf8da422577b6bb…

MALICIOUS

PDF

68.9 KB Created: 2021-02-25 13:38:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: d66d63607e8fa42227f289655e75dcd9 SHA-1: b62c5ea73676eeba99d5cf9eccc07c53057d6fec SHA-256: 8cf8da422577b6bbc8e76299e54510172f1221e0484de2e446ab395f633400a6
186 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
  • 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://maypoin.ru/wix?keyword=apush+unit+1+test+answers PDF link annotation
    • https://zuwukozoxuwiged.weebly.com/uploads/1/3/4/7/134713444/33bf05b3.pdfIn PDF document text
    • https://nadagedo.weebly.com/uploads/1/3/1/8/131858166/nufen_dolukefo_sidobinozugewob_bezasisozonolib.pdfIn PDF document text
    • https://cdn.sqhk.co/noperizapewo/6KThhja/16918469937.pdfIn PDF document text
    • https://cdn.sqhk.co/sugefixa/cgeXjaf/raid_ant_bait_pets.pdfIn PDF document text
    • https://rakamukomegu.weebly.com/uploads/1/3/2/6/132681656/7298302.pdfIn PDF document text
    • https://cdn.sqhk.co/ketifoseja/dWifibC/69290354062.pdfIn PDF document text
    • https://kujegafibez.weebly.com/uploads/1/3/4/2/134265926/9228049.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428083/normal_5fd0930817d8b.pdfIn PDF document text
    • https://cdn.sqhk.co/numiwuzuwix/yYjegdR/pilot_mountain_river_trails.pdfIn PDF document text
    • https://nodokesomizi.weebly.com/uploads/1/3/4/6/134656280/runapidasosaj.pdfIn PDF document text
    • https://cdn.sqhk.co/seworani/gdQjaPo/36603177663.pdfIn PDF document text
    • https://cdn.sqhk.co/rixakowu/cdhb8ic/megudijuripubow.pdfIn PDF document text
    • https://cdn.sqhk.co/mapetidul/ijgidjc/movie_maker_for_youtube_instagram.pdfIn PDF document text
    • https://cdn.sqhk.co/xumefotebe/N9he3uG/box_office_action_movies_2017.pdfIn PDF document text
    • https://rubebukani.weebly.com/uploads/1/3/0/7/130740450/6062129.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/nakevoja/bernadetta_tea_party_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/synonyms_and_antonyms_for_ssc_mts.pdfIn PDF document text
    • https://s3.amazonaws.com/towutoginadivu/bifeduzeruxilalenuzoruni.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_off0000d35c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD35C 5008 bytes
SHA-256: 0597d53b07bbca331c50169d087ec8f4a3430de6536d4d0aa9ff98651a2fa75e
font_01_sfnt_off0000e471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE471 9876 bytes
SHA-256: 4d6039b571f65c735bc6ca0c97be356d5863a935698caa7abe4de5c0c84cfe92

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