Malicious PDF — malware analysis report

Static analysis result for SHA-256 33c8a798bb794c84…

MALICIOUS

PDF

76.4 KB Created: 2021-03-16 09:11:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: e9355b43588d52edb0840192623b11fc SHA-1: 7cbae573d524d4b2ee07d400ce5b231b43b86484 SHA-256: 33c8a798bb794c840ccd8ba36f4832f8ce6f4f743e41fbe78d39e8b6701e2c36
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically identified as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable or suspicious domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, appears to contain keywords related to search terms, further supporting the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://xajibur.ru/strik?utm_term=whirlpool+cabrio+washer+service+manual+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4372378/normal_601d928adba48.pdfIn PDF document text
    • http://ladyso.ru/chuunibyou_light_novel_englishcdj4g.pdfIn PDF document text
    • http://roserubusigiwij.mywebcommunity.org/fopapumowixusur.pdfIn PDF document text
    • http://daneganonud.22web.org/bolizufikuro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367312/normal_6025098aed474.pdfIn PDF document text
    • http://narawodosure.medianewsonline.com/toxokuwuzozixoj.pdfIn PDF document text
    • http://simopuvoramawu.mywebcommunity.org/jaybird_x3_not_pairing_with_iphone.pdfIn PDF document text
    • http://comforfemj.fun/dork_diaries_13_downloadxp5ty.pdfIn PDF document text
    • http://vizexibidoxi.getenjoyment.net/blood_bowl_2_guide_chaos.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dabifav.epizy.com/birleik_szcklerin_yazm.pdfIn PDF document text
    • https://9c12218e-e157-4070-b33f-4467b3cb42bb.filesusr.com/ugd/0c60a0_eecb7406b1dc47a9946543e09ec7f22b.pdf?index=trueIn PDF document text
    • http://memoleroxaden.rf.gd/zemalutawabakun.pdfIn PDF document text
    • http://zizizototumat.rf.gd/tajweed_rules_in_roman_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/860d3017-d794-4845-a6d0-18f5e436bc98/secure_connection_error_return_code_95.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7fcf7a9-2ea4-4043-8fde-e85d8662235e/quicken_printer_error_code_30.pdfIn PDF document text
    • https://a62e46b8-d933-4087-892c-e5439cec6991.filesusr.com/ugd/e9cba9_1c3d76b105304dfc86de39484958f222.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/21c056d2-b0b9-46b4-9452-ddfddad87bd5/wuduledunoj.pdfIn PDF document text
    • http://livunus.rf.gd/nepiwudovef.pdfIn PDF document text
    • https://6129906d-bc82-46a7-99f5-71793a58af3c.filesusr.com/ugd/d162e3_28ee961564264677ab7d2d0373475451.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/83214f95-3c36-40c6-b646-3265f82de33b/ingenuity_baby_swing_giraffe_weight_limit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45666b11-4c70-4c9b-8552-7a3c4faf7ebf/28721008345.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_off0000e9c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C0 5700 bytes
SHA-256: 13594530099258e76e6c6c5cd846bf9d74ceff250bd0921737467397920a52ad
font_01_sfnt_off0000fd0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD0E 11616 bytes
SHA-256: 676f838429be1de5c8582a388e23676a531933ae9ad7ca649470de5b0ee0f281

Open this report in the interactive analyzer, or submit your own file for analysis.