Malicious PDF — malware analysis report

Static analysis result for SHA-256 6852ffb1788c40d8…

MALICIOUS

PDF

70.7 KB Created: 2020-12-21 23:21:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 7bbf5d3bd2f673b098b7a18070efb8fa SHA-1: 9b397b8db04a01aee4f1408a462dc869688672b6 SHA-256: 6852ffb1788c40d8f58272e1dd041acd4314112cff8750e1b4e978a1f7bc52a4
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL points to a suspicious domain, suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs are common in malicious documents designed to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffi.ru/aws?utm_term=airbrush+video+app+for+android PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4381536/normal_5fbe73a42a91e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488837/normal_5fce646cf1767.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420765/normal_5f965fb41b5b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471711/normal_5fbea82f4aec9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454170/normal_5fcdfd0c63809.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402936/normal_5f943d7b677fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376866/normal_5fbea4cbad65d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6779485-aba8-4c0d-b465-d7f56b1a6270/crank_record_player_cabinet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72a1c731-cfe6-4202-9b39-dfd60c62b501/82386615895.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc70bacfc603311fbf81dbc/t/5fd717d1313c42342ba54f5e/1607931857549/bmw_x3_2007_repair_manual.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe2e044f98375720aa7fc3/1606299142471/fidemifatigakupi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76241c91-d4c0-4f8c-b10d-c795796625b9/28899421322.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/3_part_math_lesson_plan_template_ontario.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b437871-0eec-408c-b4b5-adcf4db671c1/sanefelo.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/galaxy_attack_alien_shooter_cheat_codes_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b36d49c-6f84-4543-a1f8-513eb3a6e9ec/90065892518.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_off0000d7e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7E5 5284 bytes
SHA-256: 82a32f6256b43b92daf1058e2c992a955838d42e0d9ffb4a205e267ede62ba98
font_01_sfnt_off0000e9db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9DB 10648 bytes
SHA-256: f19dbafe35e9d9b11d706decb22706a2d74dc2ee09e1ba06992d04a4e2b47984

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