Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f355e951f04dc70…

MALICIOUS

PDF

68.6 KB Created: 2020-12-19 09:59:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 18e203889889145a75fd0fe59743775c SHA-1: c53b2ab99b62946d370c50569eedca21d7a5d06e SHA-256: 2f355e951f04dc70f47aae5aa4a424b6dc18ec3e682a546c10cd224d970fd32f
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 by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The embedded URL points to a suspicious domain, likely used for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffking.ru/strik?utm_term=van+wilder+3+freshman+year PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4408853/normal_5fddab4f53ae6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384819/normal_5f8e3d787cdc5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc514788ef7301f8b2bec82/t/5fc758841d689b68bf9a1bff/1606899845101/color_quest_ar_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be8ec35e-e6d8-4499-9e3f-7acc7c3144a1/83615026397.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/087575d6-8f78-4a9b-af9d-1cad2c8ffb49/motorsport_manager_strategy_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5fa0880-e218-4cf0-a158-d0549b4f6d6d/mamas_and_papas_instructions_cot_bed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2b2f4b8-201c-4d91-ad02-ce6b790043dc/88412494510.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10522176-44f7-40bc-aa19-afcb43a7218c/birey_a_matematik_soru_bankas_zm.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69cd5492-ee2d-44f4-976e-a1261fd513f9/belusarenir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d8a9465-f51b-45f1-bc2a-1da7e1510e62/41855017824.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aed7578a-9b33-46d7-89a5-83a64cc8a845/take_love_multiply_it_by_infinity.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7413435-b172-4976-b57a-87bd00c24fe4/buzekitimilukaru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0af8d715-5e6a-4521-baea-93178f5deaad/has_homestead_rescue_been_cancelled.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_off0000ce5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE5B 5468 bytes
SHA-256: b0e18df9fcf69f1d6b21df85dade8e7a1987bd9c6b856cc63ab7ae0d58f94e56
font_01_sfnt_off0000e0e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E9 10756 bytes
SHA-256: 2cbdec6da5b4cae58dbcd96bbb886d8f838ec8cbf7099c5e92d045ebfe70c005

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