Malicious PDF — malware analysis report

Static analysis result for SHA-256 8949d62b2de89571…

MALICIOUS

PDF

75.5 KB Created: 2021-03-24 08:26:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: aa9b3d932d547069e60384f75a45d3f1 SHA-1: 46de74c4064b089c9cbc6ae87b99469c3f02722e SHA-256: 8949d62b2de8957175cdd6a74925d3c5c7f26e3f50d46674b74fa6528748f284
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure, specifically pointing to 'https://crophysi.ru/award?keyword=calcolo+vani+catastali+pdf'. This URL is presented in a context that suggests a phishing or scam attempt, likely to trick users into visiting a malicious site. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://crophysi.ru/award?keyword=calcolo+vani+catastali+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4420927/normal_6026418098e41.pdfIn PDF document text
    • https://cdn.sqhk.co/nodezaneripe/dljasPP/world_war_2_military_records_nz.pdfIn PDF document text
    • https://cdn.sqhk.co/moxasapiwer/aR0MXic/61814699180.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481988/normal_60031ee44ac4f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385648/normal_60122234a6b6c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419827/normal_5feb7836312f0.pdfIn PDF document text
    • https://cdn.sqhk.co/papovezegep/mlhahjb/68009934420.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373753/normal_5fe5b8fd8fc2c.pdfIn PDF document text
    • https://cdn.sqhk.co/juxerawabuf/jhihBha/13348379172.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365582/normal_600cf0c5b0fb4.pdfIn PDF document text
    • https://cdn.sqhk.co/wixumenez/d3qhfza/video_player_apple_tv_4k.pdfIn PDF document text
    • https://cdn.sqhk.co/fesoxuleri/jivPFwO/fruit_bubble_tea_calories.pdfIn PDF document text
    • https://cdn.sqhk.co/visevunu/ji2gdJZ/85915590953.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lulelepese/kiwezovabulugipujonovexov.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/zagonidetodipavizinavono.pdfIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/computer_abbreviations_list.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/37599779160.pdfIn PDF document text
    • https://s3.amazonaws.com/dikomavomem/15730999972.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E2 5016 bytes
SHA-256: e7ab163eadcdd3f6b8fea52e7538af92d667686406dbd9b9db39e83567424eab
font_01_sfnt_off0000f811.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF811 12076 bytes
SHA-256: 91d01983228992964e5b22fe04dc1ca1776f3b180789f8f175000f6f71049231

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