Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7cd60157538a98f…

MALICIOUS

PDF

71.2 KB Created: 2020-11-17 16:58:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 863f24ba99cbbed2abb1b8187f7ac3d2 SHA-1: 852364af080737254a1accb106e869054e405923 SHA-256: a7cd60157538a98f3d4aeb914bb306a3764e36f435c8305ee146101d163cab8d
104 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by a ClamAV signature (Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0) and an ML classifier. A heuristic also identified an external URI, 'https://traffine.ru/strik?utm_term=christ+the+healer', which is likely a phishing or malware distribution URL. The presence of a 'download button' heuristic further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffine.ru/strik?utm_term=christ+the+healer PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4385620/normal_5fa4f3afb2650.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388163/normal_5fa467f4816ab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vezosoluvezoj/unblocked_games_333_shooting_games.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc5cc711-fc0a-4f59-b913-20e2104dee27/buddhism_vs_hinduism_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/gedesisumi/65316894488.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3075b9cf-9dec-44ed-a6e6-0a2e809bb2fb/dragon_quest_viii_3ds_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/famous_animal_rights_speeches.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/free_alphabet_writing_practice_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2701dd20-bc03-4a6d-aa59-881cb0df3fed/salem_witch_trials_escape_room_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24d4eb7a-f292-4f8d-bf88-939bfb4cbf89/62465287416.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/aspen_hysys_v8_tutorial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/309f070f-d51c-4794-a188-a37c2c670b74/kukux.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/18511278034.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/donadobakewuniga.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_off0000db6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB6B 4680 bytes
SHA-256: 96b3ffa5b2779bbe8660dfab9538d65dbdd4825900ac9b1e3feda92f1b2538b2
font_01_sfnt_off0000eb3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB3F 10764 bytes
SHA-256: 5d3c5dce86e69f2499479a297d869ac68896015d75e37327ffc6e1e59aa5c26f

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