Malicious PDF — malware analysis report

Static analysis result for SHA-256 b129573530b40a7f…

MALICIOUS

PDF

81.8 KB Created: 2020-12-17 01:05:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3aa40699c8ecef4ccd129fbfd1a5c25e SHA-1: d24181d5ad220f658c88a2582a403520ffbbd0dc SHA-256: b129573530b40a7ff9e2a20269ae85b1b217e7a8db493a3a61b2819ed01c0ccb
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating an external URI, which points to a suspicious domain. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to presentation templates, aiming to trick users into visiting the malicious URL.

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://trafffe.ru/aws?utm_term=presentation+slide+design+template
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/68f68aa3-7742-452b-9397-534f2e6d24fb/rainwear_central_viewforum.pdf
    • https://s3.amazonaws.com/fowikorejodi/the_ur-dragon_secret_lair.pdf
    • https://s3.amazonaws.com/jiwisi/66081207843.pdf
    • https://s3.amazonaws.com/ritoma/interview_questions_for_personal_assistant_and_answers.pdf
    • https://s3.amazonaws.com/wuzalugiseto/4407420258.pdf
    • https://static1.squarespace.com/static/5fc4c5cdf7cf8c754043a859/t/5fc6f5dda907d7439ccdd587/1606874594669/70099216964.pdf
    • https://s3.amazonaws.com/tixeligufokup/fojotikovimupituva.pdf
    • https://static1.squarespace.com/static/5fc693058139af03766c457b/t/5fd727ffacac596b0cd44e56/1607936003928/gobur.pdf
    • https://static1.squarespace.com/static/5fc2bb02085bf90c0e0909f1/t/5fc873fa217b3604eddd1eb9/1606972412369/xebaviza.pdf
    • https://static1.squarespace.com/static/5fc553139698b02c7f3e0be9/t/5fd1d69ceeaf2774ac8e91a7/1607587485538/deratigud.pdf
    • https://s3.amazonaws.com/tupofelasujewas/runaruvewuxi.pdf
    • https://static1.squarespace.com/static/5fc520d02cf09257bd86fd68/t/5fc96bc993b4dc627b549ac2/1607035854664/82102942155.pdf
    • https://static1.squarespace.com/static/5fc0eab716f6d44b07bedc8b/t/5fc2677718e72e5fdb255a0d/1606575992728/crispy_pata_recipes.pdf
    • https://static1.squarespace.com/static/5fc366d6ab79f442f239893b/t/5fca3791ec1d586fb3975668/1607088021334/road_rage_incidents_can_lead_to_answer_key.pdf
    • https://s3.amazonaws.com/suximawo/delowitabojoravaru.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001043d.bin
7dc7031f6136f8e8944d6ca27dff387b2c72a962b031074f1d7e6f455df2cebc
pdf-font-stream PDF embedded font (sfnt) at offset 0x1043D 5280 bytes
font_01_sfnt_off00011618.bin
db513a6260eeecdadc8477caa78fb815de7b695dd456e627f3045f4914292d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x11618 10712 bytes