Malicious PDF — malware analysis report

Static analysis result for SHA-256 e70b26a747487b29…

MALICIOUS

PDF

73.9 KB Created: 2020-12-27 14:31:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d8a7ddc833951bcbb73438bba041181c SHA-1: d05972fdc989ca6079c7310685f46285c8cb7b96 SHA-256: e70b26a747487b2909ec0b1f6f20c6f9b0b358e6a46bef68ec5abb884e5c60d8
214 Risk Score

Malware Insights

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

This PDF file was flagged by multiple critical heuristics, including a malicious redirector link and a link farm, indicating a phishing or malware distribution attempt. The embedded links, such as 'https://ggtraff.ru/strik?utm_term=2020+kansas+us+senate+election+candidates', are likely used to direct users to malicious websites. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=2020+kansas+us+senate+election+candidates
    • https://mepanomelisegil.weebly.com/uploads/1/3/4/8/134899905/mepepixep.pdf
    • https://bupigesow.weebly.com/uploads/1/3/4/3/134360728/zefup.pdf
    • https://cdn.sqhk.co/kofuvufexo/ZOib6ie/29945427847.pdf
    • https://soxoxalumowaju.weebly.com/uploads/1/3/4/7/134768556/4408507.pdf
    • https://rudofodirofebas.weebly.com/uploads/1/3/0/7/130739781/8554501.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/gelawiweza/tcm_weekly_schedule_film_noir.pdf
    • https://uploads.strikinglycdn.com/files/172d699b-224f-480c-8fb6-82d235a6a739/46398752146.pdf
    • https://uploads.strikinglycdn.com/files/da121a6c-0688-4538-8a34-aeafc52b6690/bufoguzibalepelobet.pdf
    • https://s3.amazonaws.com/jeduzizonox/58649817558.pdf
    • https://s3.amazonaws.com/mulerux/define_supporting_detail_in_an_essay.pdf
    • https://uploads.strikinglycdn.com/files/2940666d-3d01-477f-8a5c-8fe29c914f33/pusubudon.pdf
    • https://s3.amazonaws.com/nitatotol/agroforestry_books.pdf
    • https://s3.amazonaws.com/bodajaku/78737939144.pdf
    • https://s3.amazonaws.com/rurovikejigibu/beamer_template_for_thesis_presentation.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5b3.bin
637836c189606168ed47d97ae2abbad58ab9b26a2ed365a45d189ca4ca961625		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD5B3 4964 bytes
font_01_sfnt_off0000e699.bin
f86133fcc24ba9b09ab91d3f40cb60139d43f4aa5ef0fd9ba2cf97645f5ee26b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE699 11196 bytes
font_02_sfnt_off00010cae.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CAE 4324 bytes

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