Malicious PDF — malware analysis report

Static analysis result for SHA-256 152e431d94c7b125…

MALICIOUS

PDF

64.2 KB Created: 2020-11-24 23:47:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc681569e35cc679f3df732de19e047a SHA-1: 5d753610be6cfd90f7b6a35163ad6071a41ec4c0 SHA-256: 152e431d94c7b12558c4d79bf9f0aeee0f925884767a9479880582e1c1ebb0bf
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, contains strings related to software updates, suggesting a lure.

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-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=imovie+11+update
    • https://cdn-cms.f-static.net/uploads/4368977/normal_5f8a27ee52a2f.pdf
    • https://warakamaluxib.weebly.com/uploads/1/3/4/3/134378328/panilewemedir.pdf
    • https://kabijefilomi.weebly.com/uploads/1/3/4/7/134761935/35e078de8.pdf
    • https://cdn-cms.f-static.net/uploads/4470828/normal_5fbd63217bea6.pdf
    • https://dojifidixiwaji.weebly.com/uploads/1/3/4/3/134372722/molejixuwakida.pdf
    • https://cdn-cms.f-static.net/uploads/4369336/normal_5fa2179abab14.pdf
    • https://cdn-cms.f-static.net/uploads/4379220/normal_5f8a41181fd3c.pdf
    • https://zepinimokibe.weebly.com/uploads/1/3/4/3/134373719/tatid.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/195b435d-518d-4d40-a54b-41a991777c36/90684930733.pdf
    • https://s3.amazonaws.com/jeworurowam/69947379400.pdf
    • https://uploads.strikinglycdn.com/files/fa879ffa-1177-49ce-bacf-e262db7f03a1/zuwujudujovo.pdf
    • https://s3.amazonaws.com/wixatax/applications_of_trigonometric_graphs_worksheet_mathbits.pdf
    • https://uploads.strikinglycdn.com/files/2037eca8-e3b2-4f60-8380-b76fb449e05b/dokkan_battle_summon_simulator.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_off0000bc65.bin
c0c6b7bb8ee1eb07fe95a6de6b56101eebd6ceee1315e30b851e4c0785f9fb2b
pdf-font-stream PDF embedded font (sfnt) at offset 0xBC65 4848 bytes
font_01_sfnt_off0000ccd8.bin
0f4272c3b02626345f2171fc5649cd7ca4928598e27bb7a29665f74052a5cb27
pdf-font-stream PDF embedded font (sfnt) at offset 0xCCD8 15088 bytes