Malicious PDF — malware analysis report

Static analysis result for SHA-256 63a5377fdb36bc5e…

MALICIOUS

PDF

75.6 KB Created: 2021-03-23 05:16:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 9f4c550722c7e8ddf1839d747439e37f SHA-1: 4f2602b476cd971f9361099365e88c5f50b93c35 SHA-256: 63a5377fdb36bc5ec6738448c3943f7a3b07cdfb91f64a170a9529c7b9ede6de
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are likely used for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were directly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites, potentially as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://botokaw.ru/wix?keyword=language+arts+words+that+start+with+j PDF link annotation
    • http://zagavogafewakud.iblogger.org/cricket_captain_2019_android.pdfIn PDF document text
    • http://zuduwamani.mypressonline.com/bus_terminal_design_concept.pdfIn PDF document text
    • http://dumigegin.medianewsonline.com/3891042594.pdfIn PDF document text
    • https://dabikosetizoje.weebly.com/uploads/1/3/4/2/134234987/a561b81ce4fb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413228/normal_5fdd67e6ccddb.pdfIn PDF document text
    • https://xukonupuzifig.weebly.com/uploads/1/3/4/6/134621954/vufewejuweguw-sogutog.pdfIn PDF document text
    • http://bagerisevi.scienceontheweb.net/99440485038.pdfIn PDF document text
    • https://sepiximefajo.weebly.com/uploads/1/3/4/8/134849953/nosivegukixegini.pdfIn PDF document text
    • http://lorubuxetorifa.medianewsonline.com/ripimebebadux.pdfIn PDF document text
    • http://jovasetiveduza.scienceontheweb.net/apartment_rent_agreement.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481552/normal_5ff58b161ab5a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://saxodanokijaj.atwebpages.com/23204362936.pdfIn PDF document text
    • http://tananij.rf.gd/54426806801.pdfIn PDF document text
    • http://ximifakapixe.epizy.com/54940044537.pdfIn PDF document text
    • http://puvuwanixos.rf.gd/tobuvomibeketifuje.pdfIn PDF document text
    • http://lojurixerura.epizy.com/allah_hu_akbar_prayer.pdfIn PDF document text
    • http://fotizojorirepel.onlinewebshop.net/ejemplo_de_monografias_universitarias.pdfIn PDF document text
    • http://kofepiropi.onlinewebshop.net/30331934698.pdfIn PDF document text
    • http://dujizadixupodur.epizy.com/mbti_personality_type_test.pdfIn PDF document text
    • http://giduzorim.epizy.com/wemarepumava.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_off0000e899.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE899 5164 bytes
SHA-256: 86b3f1f517cd0312544a52d38b1f9b5def1aa07197dd291c086ccc6d9e072215
font_01_sfnt_off0000fa38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA38 11308 bytes
SHA-256: fc6365e0cf317deae22b014b8205025824a6e140bd8964e4217d3ac00a680e1e

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