Malicious PDF — malware analysis report

Static analysis result for SHA-256 afe50210b123e0e7…

MALICIOUS

PDF

74.5 KB Created: 2021-03-09 19:31:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: ba331ec935fbaa030768874a0c643be9 SHA-1: e696d423d3bf3f68068f7bbb57a549df3414d469 SHA-256: afe50210b123e0e7931ef915813ecbe69cfe630068afd8ff4d26316d54da4e45
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with high confidence. It contains numerous embedded URLs, with one specifically pointing to a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The PDF structure and embedded content indicate it's designed to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/award?keyword=venezuela+politica+y+petroleo+romulo+betancourt+pdf PDF link annotation
    • https://nesilinazum.weebly.com/uploads/1/3/4/8/134886609/wexebukojajebuna.pdfIn PDF document text
    • http://doordash.link/how_to_connect_my_ilive_soundbar_to_my_samsung_tvaj6gn.pdfIn PDF document text
    • http://jobatuzuru.22web.org/kenmore_gas_stove_not_heating_up.pdfIn PDF document text
    • https://wididalinur.weebly.com/uploads/1/3/3/9/133986726/budunaji.pdfIn PDF document text
    • http://circleshtang.xyz/english_learning_programs_for_spanish_speakersjh05d.pdfIn PDF document text
    • https://gozerezujokosas.weebly.com/uploads/1/3/4/8/134856803/batunoxozimugikogata.pdfIn PDF document text
    • https://digavonuvuveg.weebly.com/uploads/1/3/4/8/134851043/zimojodorupup.pdfIn PDF document text
    • https://redulexaxoxega.weebly.com/uploads/1/3/0/8/130874010/rusolemar.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8064c41f-84bc-4ef9-bbfa-9e9a88f7020f/stolen_legacy_george_james.pdfIn PDF document text
    • http://pasumogebono.rf.gd/canon_eos_5d_mk_iii_manual.pdfIn PDF document text
    • http://fapobek.epizy.com/20642301324.pdfIn PDF document text
    • http://sozitemow.epizy.com/baba_is_you_android_port.pdfIn PDF document text
    • http://dunugamufaj.epizy.com/zifexituwoboxag.pdfIn PDF document text
    • http://xivutunitilema.epizy.com/bebizi.pdfIn PDF document text
    • http://zapudeni.epizy.com/mugosoferaganijokuka.pdfIn PDF document text
    • http://pupovedifa.rf.gd/chacha_bhatija_video_mp4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70fe00d4-5c50-4f2d-9be2-6342161b5d6b/java_8_update_271_64_bit_filehippo.pdfIn PDF document text
    • http://vugapadilubokis.epizy.com/barbie_princess_charm_school_uniform_costume.pdfIn PDF document text
    • http://fikokelu.rf.gd/muganofiravitagetulad.pdfIn PDF document text
    • http://zorogeloma.epizy.com/wibevekuli.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_off0000e3c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C3 5380 bytes
SHA-256: dee92b51530184b94a565504b70393eb7a74fb91d976a6d2d7f9e7c8f8e00874
font_01_sfnt_off0000f60c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF60C 11236 bytes
SHA-256: bef2615700cda3c844891cbaca9d67fffc13de0117c7400c469124e02e260814

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