Malicious PDF — malware analysis report

Static analysis result for SHA-256 69fde4c0d4d66301…

MALICIOUS

PDF

79.6 KB Created: 2020-12-27 16:06:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc802feb0980cd89d33faebd6e78dc20 SHA-1: d8523936ddd2da85eb5fbe80fd66b0d25d6326be SHA-256: 69fde4c0d4d66301c5144137d14f81dd0ab6673f477568a9fb681905eb260b4b
214 Risk Score

Malware Insights

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

The PDF contains numerous links, with one specifically pointing to a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs and the heuristic firing 'PDF_MALICIOUS_REDIRECTOR_LINK' suggest the document is designed to redirect users to harmful sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/aws?utm_term=android+wear+on+iphone+x
    • https://jezasowafinam.weebly.com/uploads/1/3/4/5/134530254/7019074.pdf
    • https://cdn.sqhk.co/xobitabab/VKijII9/my_success_story_business_game_hacked_apk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vatosolikijike/nivuxuxidegejusulawomo.pdf
    • https://s3.amazonaws.com/banula/17445538263.pdf
    • https://s3.amazonaws.com/nigimul/paxomazovamezenojabizikuz.pdf
    • https://s3.amazonaws.com/radaruropivoje/hobart_lx18_dishwasher_repair_manual.pdf
    • https://s3.amazonaws.com/fezenur/kyocera_cadence_lte.pdf
    • https://s3.amazonaws.com/wujixus/42032405933.pdf
    • https://s3.amazonaws.com/foneniz/bemupuwajozipebexijenopal.pdf
    • https://s3.amazonaws.com/xuzed/bedingte_wahrscheinlichkeit_formel_beispiel.pdf
    • https://s3.amazonaws.com/tosevud/95321698791.pdf
    • https://s3.amazonaws.com/difigomisosak/multiplication_worksheets_grade_3_0-_12.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e602.bin
ee0c366e66b19d23da00181088d1fe2c5fd2c948c732a4b37d848b4bcf410702		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE602 4984 bytes
font_01_sfnt_off0000f704.bin
6ff145c1abd2cf88537a1bd6fbeb495ab6efc0f5effaf88f563162689f094652		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF704 10940 bytes
font_02_sfnt_off00011c0f.bin
43f18b73c6b83a7361b0f82441ef3583dcb4cea91362d9c0926e05ad0fdd565d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C0F 16284 bytes

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