Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dbd8b9ba563f8a0…

MALICIOUS

PDF

74.5 KB Created: 2020-11-18 13:44:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa647f9efba40e2324f7f3337eb42c4d SHA-1: d3f0037dd175b8385e46ab07a13124d595c44b74 SHA-256: 0dbd8b9ba563f8a03cb651bb592d9268642c65d958985d11185b0eea223a3d31
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains an embedded URL that, when visited, appears to be a lure for search engine traffic related to "stoichiometry pre lab questions answers". The PDF structure and embedded content suggest it is designed to exploit users seeking information, leading them to a potentially malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffnew.ru/123?utm_term=stoichiometry+pre+lab+questions+answers
    • https://zetaxufonepijak.weebly.com/uploads/1/3/4/3/134353616/zupujunu.pdf
    • https://josafobuwevaj.weebly.com/uploads/1/3/4/4/134464642/8396064.pdf
    • https://nulosogitizibe.weebly.com/uploads/1/3/4/3/134317173/8643571.pdf
    • https://gewosawoma.weebly.com/uploads/1/3/0/7/130739201/galama-muwabenawat.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/fuwenoxuzasila/nimagiwemerovix.pdf
    • https://uploads.strikinglycdn.com/files/214debfd-299f-4fe4-b82b-007168174315/how_to_spin_a_pencil_continuously.pdf
    • https://uploads.strikinglycdn.com/files/c0bec6fe-4b49-488b-8dc9-dbc3440ed7d9/75203934967.pdf
    • https://s3.amazonaws.com/dadupawo/2002_honda_civic_ex_service_manual.pdf
    • https://uploads.strikinglycdn.com/files/e602e857-5b1f-424a-89b0-c57e8bed454f/fotuvilazadafifanokulu.pdf
    • https://uploads.strikinglycdn.com/files/186f414e-8af4-42e5-ae57-18c80f333ebe/baranoraginan.pdf
    • https://s3.amazonaws.com/varoximu/spring_framework_durgasoft.pdf
    • https://s3.amazonaws.com/matogapibelifiv/tigupe.pdf
    • https://uploads.strikinglycdn.com/files/7b9a4b33-2267-4277-9728-a1018f26aa70/the_pursuit_of_happyness_discussion_questions.pdf
    • https://s3.amazonaws.com/zuvovoxigumuz/baby_shopping_cart_cover.pdf
    • https://s3.amazonaws.com/moduxanakuri/62626091723.pdf
    • https://uploads.strikinglycdn.com/files/bc9ae989-c848-4fed-87cf-77c61b07d47c/67244323848.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7c2.bin
2202200544e75ed0729c6c05d1bb554d87ab09721b89c1ee8d3137fca7d409b7
pdf-font-stream PDF embedded font (sfnt) at offset 0xD7C2 5616 bytes
font_01_sfnt_off0000eab4.bin
11433ba2daae9c7cc180ce2add9c724674eb8c592d7fa69f74a742d3d0381a40
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB4 10600 bytes
font_02_sfnt_off00010eca.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x10ECA 4324 bytes