Malicious PDF — malware analysis report

Static analysis result for SHA-256 76f9b74dd05c87a8…

MALICIOUS

PDF

80.5 KB Created: 2021-04-03 16:24:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: f1b272ad340f262cca47d88d56939df5 SHA-1: 59e5693b1e78f278d80d3f8dd33cf2a8799bc429 SHA-256: 76f9b74dd05c87a815bf87b8dfd416fcdc381bd450acdf2cf1b98910b499028c
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL, https://mezovuduw.ru/wix?keyword=ionic+compounds+list+with+charges, is the primary indicator of compromise and likely serves as a lure for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and heuristics suggest it's designed to exploit users by directing them to this external resource.

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://mezovuduw.ru/wix?keyword=ionic+compounds+list+with+charges PDF link annotation
    • http://rawufomoju.22web.org/13713076024.pdfIn PDF document text
    • http://loruwifu.22web.org/2008_dodge_avenger_rt_awd_problems.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369518/normal_603252e8ca27e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389824/normal_60580e14a4692.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392877/normal_60498c2778900.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373768/normal_5fca24d5871e3.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/jazuravazaguz/aadhar_card_form_fill_up_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9c8ae8e-8a83-4bea-bd3d-569ea9b82e29/30792925994.pdfIn PDF document text
    • http://rinudesit.epizy.com/rig_veda_in_malayalam.pdfIn PDF document text
    • http://javajese.epizy.com/esp8266_arduino_tutorial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bbbdc3f-d6c5-409a-86b7-ccddc7754ff0/monitor_de_signos_vitales_philips_intellivue_mx450.pdfIn PDF document text
    • https://s3.amazonaws.com/gedexim/autocad_for_windows_xp.pdfIn PDF document text
    • http://midotujeg.rf.gd/zexujataxivu.pdfIn PDF document text
    • http://ribibivuja.rf.gd/how_much_is_sonic_milkshakes.pdfIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/68562274417.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/logic_in_geometry_vocabulary_crossword_puzzle_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/kodipopujufipig/rijisowexorafit.pdfIn PDF document text
    • https://s3.amazonaws.com/gazijewevan/george_s_marvellous_medicine.pdfIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/17475642461.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_off0000fb7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB7D 5516 bytes
SHA-256: dbb137368c7072fe11074000b9cda8a617c5d6beef7b6ff982399cfb755e3da0
font_01_sfnt_off00010e22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E22 11208 bytes
SHA-256: 752e2a539ea04c106cb456206d06b34f9573544b0459da8f04c7f2fc1ba20671

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