Malicious PDF — malware analysis report

Static analysis result for SHA-256 7be3c64d2bfdfe1b…

MALICIOUS

PDF

77.3 KB Created: 2020-12-26 02:40:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 284fc02538912cd239ddc71d65009241 SHA-1: b11bcbf6447ca0cbf587ab78234f123539d99be0 SHA-256: 7be3c64d2bfdfe1be702726c28aa701582d9a7a2d67aceb903351034bf483863
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, with one critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains text related to game hacks, suggesting a lure. The presence of multiple external PDF links, some benign and some potentially malicious, indicates a link farm or redirection strategy. ClamAV also detected this file as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ggtraff.ru/strik?utm_term=hero+legend+shadow+stickman+hack+mod+apk In PDF document text
    • https://kigovedinefetup.weebly.com/uploads/1/3/1/3/131384362/silamoza.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368222/normal_5fc3fd4100fbe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463803/normal_5fc2223e728bd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ba4f557-78c4-42ee-8906-936b680f1ce3/21070032654.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bfe8a2a-fd2d-4fd7-b39f-9122207354d5/wozili.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7da8c903-5902-4da5-8fb3-ea1aee78364d/download_pixel_car_racer_mod_apk_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d97868c-fcaf-4443-a13b-ce83becb4357/chicken_gun_mod_apk_1._7._7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97a1ef5e-7065-4b35-aff4-967cc853517a/79705195683.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32af99aa-9bec-4210-8b67-aabe4e798fd3/zobewetika.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2caeb36b-964d-40da-9493-bafd5140c8d2/mitek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f73fbd63-4b76-4888-8ba1-64c6e2264b2c/fidumusatuli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1729441a-723c-4143-8cf0-e2f671fe6f53/kojorusuforamagageribobob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b5bf308-e209-4399-aa8c-067ea8140980/gixivijo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/246cc67b-c40c-4e45-be0d-ea5ce8cf51c1/zuwibotunezepenap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/609e96ff-0e1f-4da2-8a1b-f6fd9d57665d/nadufabujilol.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC1F 5604 bytes
SHA-256: 1a21d801ad605e35e49abb32ae1a37a24f70bcc369a57b76426c8f2b06fcb94c
font_01_sfnt_off0000ef19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF19 10468 bytes
SHA-256: cdfd3d8322c28cc82509d1b9f6770af324d4d1d4f1f499d8084e89e6f2874dc3
font_02_sfnt_off0001134a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1134A 16092 bytes
SHA-256: 5d067f3ed25c947100d6e11befc4ff8f2526c29946dd398e4c33d9c92d35bad5

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