Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5d244dc21a202a4…

MALICIOUS

PDF

77.9 KB Created: 2021-03-28 10:57:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 09f83d1abffa7edaba9169357da36bae SHA-1: e7d90428ae02688c5ed18d52a82d0ecf48f18190 SHA-256: a5d244dc21a202a408adaec28f06118643e2eadee215909dc01e59e845e684f1
96 Risk Score

Malware Insights

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

The file is a PDF document detected as malicious by ML classifiers and ClamAV, specifically identified as Pdf.Phishing.Trojan. It contains an embedded URL that masquerades as a recipe book, likely to trick users into clicking it. The PDF structure and embedded content suggest it's designed to lead users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://leonvi.ru/award?keyword=simple+cake+recipe+book+pdf
    • https://cdn-cms.f-static.net/uploads/4384822/normal_6045129e28a68.pdf
    • https://cdn-cms.f-static.net/uploads/4393785/normal_602a6e42a34ba.pdf
    • http://nejupike.mygamesonline.org/central_dogma_transcription.pdf
    • http://sizerasadaxer.mywebcommunity.org/mimujekuwesigemebimojizuv.pdf
    • https://cdn-cms.f-static.net/uploads/4464070/normal_5fd64317c4a05.pdf
    • https://cdn-cms.f-static.net/uploads/4388040/normal_6056493fd201f.pdf
    • https://cdn-cms.f-static.net/uploads/4457563/normal_60200c27eec47.pdf
    • https://static.s123-cdn-static.com/uploads/4426971/normal_5fe165d4b21c1.pdf
    • https://cdn-cms.f-static.net/uploads/4477183/normal_60444b7835f9d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/461f87e7-d158-48ef-b80b-764a2ca1be06/social_justice_questions_to_ask.pdf
    • http://dogiwexor.myartsonline.com/wubezijivotiruvakawunov.pdf
    • https://uploads.strikinglycdn.com/files/0be58d23-0428-4e56-9526-f56086d7da83/pebula.pdf
    • https://uploads.strikinglycdn.com/files/6efdd15c-e1c1-4709-aeba-b49acb351982/37987301244.pdf
    • https://uploads.strikinglycdn.com/files/728923ae-97ff-49f0-b7e0-2d5146758117/50_ways_to_leave_your_lover_drum_lesson.pdf
    • https://uploads.strikinglycdn.com/files/2ffaee07-b102-47ee-8737-9c52df2dae2a/whats_the_ugliest_sea_creature.pdf
    • https://uploads.strikinglycdn.com/files/461313e2-faf7-4d8f-90be-b31f03564726/negotiable_instruments_act_1881_in_hindi.pdf
    • https://uploads.strikinglycdn.com/files/93ec97fc-74f0-446b-8b61-abb67a52d9a0/in_the_heights_release_date_2020.pdf
    • https://uploads.strikinglycdn.com/files/787d240f-e5a6-4862-8b86-dfb0a864f390/vumabobisimedilej.pdf
    • https://uploads.strikinglycdn.com/files/d7af0a82-7545-4458-8a4d-10a274298dd2/simplified_numerical_analysis_1_download.pdf
    • https://uploads.strikinglycdn.com/files/ad4dd12c-7f86-45ed-b1f4-94c1db4e6f6d/sohcahtoa_word_problems_with_answers.pdf
    • https://uploads.strikinglycdn.com/files/01b388f8-6ed6-4d1d-b126-24d46aeddcef/rudesakutan.pdf
    • http://naranosufok.atwebpages.com/wotitolagerumesewijibi.pdf
    • http://nopawalaxuwaw.onlinewebshop.net/54586410057.pdf
    • https://uploads.strikinglycdn.com/files/94b74845-4626-4134-b82a-4650350d81e9/honda_es6500_generator_oil_filter.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f36b.bin
b4993e26bcb30a9f999a161579e08e6a769fa34175e0feabe861a7fc7b102bb4
pdf-font-stream PDF embedded font (sfnt) at offset 0xF36B 5432 bytes
font_01_sfnt_off000105cb.bin
2734f2facbfac604efb9c0631a3121938bb6ed41eddbed2ac0143a050a8dd701
pdf-font-stream PDF embedded font (sfnt) at offset 0x105CB 10572 bytes