Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7db9c742fe9590f…

MALICIOUS

PDF

128.7 KB Created: 2021-03-15 14:41:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 2dda079e6d2f544bc6c208d95d91bab1 SHA-1: c95541843f7193c8031976ed4c736dd54dbba73c SHA-256: d7db9c742fe9590f7ad0fea08e5adcbdc7253868e7117283d753c1c215820e33
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'resalured.ru', which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the ML/ClamAV detections suggest the PDF is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/123?utm_term=full+form+of+police+and+army+navy PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4470380/normal_6015ed2f3b721.pdfIn PDF document text
    • http://naxiramomamaz.66ghz.com/devikaju.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375886/normal_5fc7e9a210049.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379718/normal_5fd7b172002f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455390/normal_60283bf4be3cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380223/normal_601a4d19bb288.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374682/normal_5fff44af88237.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425533/normal_5ffcda52ed77d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450898/normal_5fea36c170b5c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420239/normal_5fce83acb9017.pdfIn PDF document text
    • http://gumizofet.22web.org/disneyland_decorative_border_puzzle_map.pdfIn PDF document text
    • http://vedatolinofiz.iblogger.org/sigenotimibijadijexijira.pdfIn PDF document text
    • https://cdn.sqhk.co/baxewoxevum/bk3dKzx/jubekibonodoxa.pdfIn PDF document text
    • https://cdn.sqhk.co/moviferu/idhergi/pocket_tanks_online.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452609/normal_5fedaae2dbf8f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447877/normal_5fe58aca7a50c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374376/normal_602993908888b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424347/normal_60021bf26037f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426967/normal_60083c7012976.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pedojup.rf.gd/audio_video_mixer_cutter_app.pdfIn PDF document text
    • http://gaxodisesi.rf.gd/96677265934.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_off0001bbfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BBFB 5240 bytes
SHA-256: 35a0fbc1a5b8e1c355c686b030246ca50197a260991fb31d8440f921f0e90708
font_01_sfnt_off0001cdcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CDCB 11996 bytes
SHA-256: 23771aba3e7fe9e08dabc232b05726e856068df8f2bd1aaeb041b89937555d3d

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