Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab71d80596acb08a…

MALICIOUS

PDF

73.5 KB Created: 2021-03-18 07:50:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 2540b5c367c6dbdac26f86da97dc680d SHA-1: 08ad4d0c23942ca44b690ddcf082517cee515024 SHA-256: ab71d80596acb08a9ff53ec1431cb82a38131deaf5b109585e9d907b61eb23ed
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. The document body, though heavily obfuscated, contains text related to 'ds2 mp3 download', suggesting a lure. The presence of multiple external URIs, many pointing to disposable hosting, indicates a link farm designed to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://pelibifir.ru/wix?keyword=ds2+mp3+download PDF link annotation
    • http://pimebujeben.66ghz.com/gomovejobejawa.pdfIn PDF document text
    • http://fafikup.scienceontheweb.net/schooled_by_gordon_korman_book_trailer.pdfIn PDF document text
    • http://mofizikozi.22web.org/bijiziradodaxevexijid.pdfIn PDF document text
    • http://jaralet.getenjoyment.net/rheem_hot_water_heater_installation.pdfIn PDF document text
    • http://tulomodev.getenjoyment.net/36834853528.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://14535e1a-360a-4d01-a655-fa33e115c80e.filesusr.com/ugd/b222ea_f4f2123c1d68420893e3dd5a6217a970.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dofufiri/glintt_annual_report.pdfIn PDF document text
    • https://b8436764-02b3-4471-8711-1e8fed235cf0.filesusr.com/ugd/3b3fbb_8b66277f1421443f9c752f88098b654c.pdf?index=trueIn PDF document text
    • http://vukenorap.epizy.com/gejala_alternaria_porri.pdfIn PDF document text
    • http://guxejusoselota.myartsonline.com/how_to_arrange_numbers_in_decreasing_order.pdfIn PDF document text
    • http://nekenomafoj.epizy.com/what_is_the_best_soccer_streaming_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e248c078-bc1d-4879-bfee-1accdeaf9101/kevalinofotobitawigito.pdfIn PDF document text
    • http://wotonopeg.epizy.com/balance_sheet_format_as_per_companies_act.pdfIn PDF document text
    • https://a39ac558-8fe8-437d-9e10-dc9402d6cb9c.filesusr.com/ugd/1ebe14_73982c4b39eb480ba22f6c65452b6efc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d02c9ee-ae62-4c1b-aee3-ec6a568df128/what_are_critical_thinking_skills.pdfIn PDF document text
    • https://2386e270-bd20-42c1-b3e5-1ba7eaa1d68d.filesusr.com/ugd/b4f0c6_7715ee61691c467cbf037942eca268b1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/chick_fil_a_app.pdfIn PDF document text
    • https://s3.amazonaws.com/jepavilutabilel/97246475451.pdfIn PDF document text
    • http://jegefikaxat.epizy.com/how_to_find_f-gx_calculator.pdfIn PDF document text
    • http://gotelunokokipu.rf.gd/72869507046.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/free_printable_calligraphy_guide_sheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1c9b617-b7e6-4c41-8dee-96c4365893c3/xarififurejiwisozizukobur.pdfIn PDF document text
    • https://97783159-ced7-426e-9fbd-60d2bb3342fb.filesusr.com/ugd/00058f_a3032173e4374e0a92a8b4b5c353ec0b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/945e6643-430b-4472-af74-7b6339b8d9ff/zufufadawe.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_off0000df05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF05 5396 bytes
SHA-256: 02c6e6524d74573335dee1902c0fceb78c7a89b1d9820b691d0bda4571cf3e0f
font_01_sfnt_off0000f166.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF166 11504 bytes
SHA-256: 952ace4fcd6136ece5edb11b488b186b4a7046de7ddc215f88232524a8226bd2