Malicious PDF — malware analysis report

Static analysis result for SHA-256 baf95618e45eb635…

MALICIOUS

PDF

92.6 KB Created: 2021-01-02 22:22:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 5e3444aab55526146a66ef3c1c3fe703 SHA-1: ece5a3a75f9639a321fa0c9a43011f39cea2964c SHA-256: baf95618e45eb635aa3bfe33620a2d8f809e771508374fb3b2a92c2cd415f399
104 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URI pointing to 'trafftec.ru', which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the presence of an AcroForm button with an action trigger suggests interactive elements designed to lead the user to the malicious URL.

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
  • AcroForm button with action trigger low PDF_ACROFORM_BUTTON
    PDF contains a /Btn form field together with a SubmitForm/URI/Launch/JS trigger — this is the building block of fake 'Download' or 'Open' button overlays used in PDF phishing lures
  • 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://trafftec.ru/123?utm_term=linear+programming+excel+solver+template PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370987/normal_5fd12ed1e98b9.pdfIn PDF document text
    • https://cdn.sqhk.co/fadanade/Nhhjjdy/kopumaxotalixezis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404975/normal_5fa384d60cdce.pdfIn PDF document text
    • https://cdn.sqhk.co/bawevabob/ihigJ5g/dexagoguk.pdfIn PDF document text
    • https://cdn.sqhk.co/tupipitijil/hhMjfGk/roblox_username_and_password_guessing_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/nunewole/hgScdgi/zozuxuwubazekenisos.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418192/normal_5fe5dbdc7ee31.pdfIn PDF document text
    • https://cdn.sqhk.co/sugezigo/jFWhahi/usa_train_simulator_2019_gameplay.pdfIn PDF document text
    • https://cdn.sqhk.co/kupulifip/he4Tjdb/67043838133.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369926/normal_5fab9b7d88152.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/tazopaju/sizoduredalozonemamosaf.pdfIn PDF document text
    • https://s3.amazonaws.com/legobegutulo/mathematical_analysis_book_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cf4ceec-e9f8-4992-8b20-38e47cbf265e/kim_hyun_joong_son_age.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/415a59a0-8891-44dd-aff7-25ed330bb8b4/peso_del_alambron.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/21930871269.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011eba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EBA 5112 bytes
SHA-256: c262df3046417df84f0a1ce477c85cb7435d2833da783d97fddc1d10d79f05e1
font_01_sfnt_off00013008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13008 11088 bytes
SHA-256: a0c429689a5a94fcf3717b084a81f89c547566a4cf419cf51e64fd3e08a1943b
font_02_sfnt_off0001555c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1555C 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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