Malicious PDF — malware analysis report

Static analysis result for SHA-256 32af502766f88640…

MALICIOUS

PDF

59.5 KB Created: 2020-12-27 02:11:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7481b11006caf098f4bc782e8e5da3e0 SHA-1: c7f79d1be1310963eaf81b4c2513f4ac08c2babc SHA-256: 32af502766f88640aae2186376d98596242f51a49eb7cf959b1d0c4da791cb6f
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. The document contains a large number of embedded URLs pointing to various PDF files hosted on platforms like Weebly and Strikingly, suggesting a link farm or SEO manipulation tactic. The presence of a malicious redirector URL indicates an attempt to lead users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://gettraff.ru/strik?utm_term=you+save+me+the+winery+dogs+lyrics
    • https://befakudi.weebly.com/uploads/1/3/4/5/134595811/05509f07937.pdf
    • https://cdn.sqhk.co/ditetona/dOiiTWB/tow_truck_icon_png.pdf
    • https://zujetopefij.weebly.com/uploads/1/3/4/7/134766602/gapamip.pdf
    • https://cdn.sqhk.co/kozuvurop/biiejew/classic_games_arcade_emulator_apk.pdf
    • https://gobumireg.weebly.com/uploads/1/3/1/3/131383916/a7f5558253f90.pdf
    • https://cdn.sqhk.co/gifitebona/CiD8jjH/91396058261.pdf
    • https://cdn.sqhk.co/banifiga/Imji6gj/gold_mines_in_minecraft.pdf
    • https://cdn.sqhk.co/boxokozofe/gYhe9hd/god_of_highschool_battle_theme.pdf
    • https://fenatelelopowi.weebly.com/uploads/1/3/4/5/134510159/xaxew.pdf
    • https://rovorakule.weebly.com/uploads/1/3/4/7/134774255/1d1597c2f9dbce6.pdf
    • https://cdn-cms.f-static.net/uploads/4377678/normal_5f9a08f76d91d.pdf
    • https://cdn.sqhk.co/tiruxugajo/UieQiad/65049051024.pdf
    • https://cdn-cms.f-static.net/uploads/4382187/normal_5f9f1042aae4a.pdf
    • https://static.s123-cdn-static.com/uploads/4467912/normal_5fcb589e1f7e4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/c3e041fb-8bf8-41f0-96f3-c0f256a5c1dc/tofofekezufulazogofixuzo.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b072.bin
468967e1ef9e32a7bd5496d6dc54970a446541801b23d2a3bc94dc9af4a6fe7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB072 5568 bytes
font_01_sfnt_off0000c356.bin
9b5de13e659dff4ff3bc8a0f7f7d8f5f2eceb3d7ae249f58a286cfd0d00ecfd1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC356 8764 bytes

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