Malicious PDF — malware analysis report

Static analysis result for SHA-256 3471d95aa3433690…

MALICIOUS

PDF

72.9 KB Created: 2020-12-17 23:14:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: aeee591a190b0ab9b1039e8883a751c9 SHA-1: 972e36c73f9f831a75855d05a3577e1357aa845b SHA-256: 3471d95aa3433690245398b8f4c0010bc7caeaf1279a1cce0f737a6279fb705d
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure. It also contains a large number of external PDF links, suggesting a link farm or SEO abuse. The ML classifier and ClamAV also strongly indicate maliciousness. The embedded URLs point to potentially harmful sites, and the document body, though truncated, contains references to the redirector 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/123?utm_term=dcast+in+r In PDF document text
    • https://bizitodavil.weebly.com/uploads/1/3/4/3/134321392/rodobodejabo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379035/normal_5fc74971c3dd4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366360/normal_5f8ab3443dec3.pdfIn PDF document text
    • https://rabugotekinevod.weebly.com/uploads/1/3/1/8/131871666/50338051.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/43854381237.pdfIn PDF document text
    • https://s3.amazonaws.com/kubafezin/87097027804.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19c71c84-7692-4dca-b83b-f2e019167569/temel_immnoloji_kitab.pdfIn PDF document text
    • https://s3.amazonaws.com/rixevozajixezos/apc_ups_calibration_software_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12fc8ce4-b579-48a3-b433-24ccca2f40ce/fresno_ca_tv_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43a97b16-37fa-4b90-b98e-e8406ba34e1d/75244717832.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7ab0310d6a92a736d7bc1/t/5fccf0822bc7884852b5cf08/1607266435753/extreme_car_driving_simulator_2015_hack_apk_mod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61f08c60-b677-4d39-a86b-b9e79a3f18a0/lifipuzigedis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfdc9880-72e8-43c1-ab20-4fcb66dd5917/vodena.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibebulosaxug/zarutifeditenorez.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_off0000e027.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE027 4760 bytes
SHA-256: 41451a6fdb5e5e958dbbe87c2e224c95a340a2526adb1d316db6ef8d9cf93471
font_01_sfnt_off0000f067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF067 11432 bytes
SHA-256: 21f99493aec8814827e01dbb113350efe3a6fad6fce7bc1bc703e01b5a78b7b5

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