Malicious PDF — malware analysis report

Static analysis result for SHA-256 12a0dbf1a0beafc0…

MALICIOUS

PDF

78.1 KB Created: 2021-03-25 18:36:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: f56619477bfd3691d2d5478911894843 SHA-1: 566098635e1e93ec7139f4f923be242556f2f5d6 SHA-256: 12a0dbf1a0beafc08e472f4dfe88b57023b7443d1266f1e6a8a94f9771ad33e2
184 Risk Score

Malware Insights

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

The PDF contains embedded links that are flagged as malicious redirectors, pointing to infrastructure designed to host phishing content or distribute malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • 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 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://yafferge.ru/award?keyword=anemia+megaloblastik+adalah+pdf In PDF document text
    • http://ellmax-site.xyz/exalted_3e_dragon_blooded_character_sheetkbe7b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460677/normal_601a5254c2439.pdfIn PDF document text
    • http://urolog.xyz/1o_de_maio__feriadojcly6.pdfIn PDF document text
    • http://nudistoff.club/makupodetiwejekeviv242l.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413000/normal_6006b971bedaa.pdfIn PDF document text
    • http://ketotreno.buzz/10270501216g9a6m.pdfIn PDF document text
    • http://krokoboko3.xyz/siwatakatekirasmpcmr.pdfIn PDF document text
    • http://shop-profildoors.ru/565909500579e1za.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458125/normal_600bd2f1b4c5b.pdfIn PDF document text
    • http://susurrus.space/ue_boom_speaker_connect_to_pc6zopm.pdfIn PDF document text
    • http://souve.me/penobufixapes7tzvl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491686/normal_603872ae2ac33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462354/normal_603d1cf077e9b.pdfIn PDF document text
    • http://banepudota.iblogger.org/ateizmi_anlamak.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493200/normal_6004dfdc520a4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415302/normal_5fc7eaf4ad3d9.pdfIn PDF document text
    • http://cyberlife.store/vudujopidgd12z.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4531523/normal_5fd0a252807eb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rajemezipuz.rf.gd/porsche_cayenne_gts_manual_transmission.pdfIn PDF document text
    • http://puxedasepuk.epizy.com/fubodevegexepojenete.pdfIn PDF document text
    • http://dimogotewebi.epizy.com/25961655990.pdfIn PDF document text
    • http://ruwutivepob.rf.gd/sbi_personal_loan_form_fill_up.pdfIn PDF document text
    • http://dowijasimenazo.epizy.com/newamogewigituwebu.pdfIn PDF document text
    • http://wazuvit.rf.gd/ames_performance_forum.pdfIn PDF document text
    • http://vimonaker.epizy.com/fotes.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_off0000f35c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF35C 5552 bytes
SHA-256: cb1f12e8d9ff7dc5aeac4f62702bfed38477fc03e7ad6ccefa2bc31b372335f2
font_01_sfnt_off00010610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10610 10476 bytes
SHA-256: 18b0bdb8bda9c2c273326d57e4bb927eeab32fc2a8318d2a4e92864ce14083b8

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