Malicious PDF — malware analysis report

Static analysis result for SHA-256 efd672a5213aeebf…

MALICIOUS

PDF

66.8 KB Created: 2020-12-21 12:40:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: d2b0869613e1f1d9b42fb3da4314c781 SHA-1: d0006751a9b113d23dc335265d3d62980cae9a04 SHA-256: efd672a5213aeebf882a5d5b14d4b1b79c5a1d970a1cc8eab4d031fc41e60d7c
214 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to a URL disguised as a free flight simulator download. This URL is likely part of a phishing or scam campaign. The ML classifier and ClamAV detection further support the malicious nature of this PDF, indicating it's designed to lead users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffmen.ru/123?utm_term=phoenix+model+flight+simulator+free+download In PDF document text
    • https://turonobofudub.weebly.com/uploads/1/3/4/4/134463989/2609942.pdfIn PDF document text
    • https://viweposedijul.weebly.com/uploads/1/3/1/0/131070314/lexenumijosowemakaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492897/normal_5fabcd67a6391.pdfIn PDF document text
    • https://sufimaxunexex.weebly.com/uploads/1/3/4/3/134345405/2b4935f7.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/5fc0ba3b0a2757459be1f9cb/t/5fc35daea97599144e62e881/1606639024178/93788005207.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5b2678139af037665e521/t/5fd190367c12252903ee085e/1607569462866/animus_harbinger_apk_obb_mod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c2ffd5e-af76-4afc-a0d5-f452dea46f2d/tumukonolapeged.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4cf2f8cdb769c6d9162e/1606372595221/reading_a_climate_map_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4ab6de0-6de8-452b-bdce-ff4531804926/1_def_pure_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ec955687f52b6b8145c1/t/5fc46b70f81c9a2a0c2fd667/1606708080478/amc_10b_2016_22.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff961e7a-b7c0-439a-a16b-317a88451525/32241623172.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_off0000c809.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC809 5480 bytes
SHA-256: 4005c30c574a516c8d2f26e1ebc170d3b12e04430894fa9fdf08cb3312a4ec7f
font_01_sfnt_off0000da9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA9E 10552 bytes
SHA-256: 316d4d113843df8036c4bdcb5f0f96bcf8c5ad42c9793bcc42221e98ad64aabf

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