Malicious PDF — malware analysis report

Static analysis result for SHA-256 16f2c8470e318fd6…

MALICIOUS

PDF

87.4 KB Created: 2021-03-28 10:56:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5044ba160aaec763045a4e348d1447a1 SHA-1: e8e1e41f18be748683aaafbcc79b1eb001e54e85 SHA-256: 16f2c8470e318fd6427a32bb15100df29637edf50c88175e10f60fb3f40f187d
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that masquerades as a search result for free books, likely to trick users into visiting a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. No scripts were extracted, but the presence of a suspicious URL and the high confidence detection scores point to a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jumiwimov.ru/award?keyword=ma+urdu+books+pdf+free+download+part+1
    • https://cdn-cms.f-static.net/uploads/4417644/normal_601b98dae35a6.pdf
    • https://cdn.sqhk.co/nexetifosam/Zgdicig/smart_tube_technology.pdf
    • http://vasakuso.sportsontheweb.net/how_to_operate_bissell_little_green_machine.pdf
    • https://cdn.sqhk.co/sixitigoxeto/h1pPW3r/idle_heroes_10_star_hero_replacement.pdf
    • https://cdn-cms.f-static.net/uploads/4492573/normal_60302a2eec66c.pdf
    • https://cdn.sqhk.co/wigatozaduw/Pjeugjb/4719479897.pdf
    • https://cdn.sqhk.co/kibukumivu/vNjg3gg/vikemoxufu.pdf
    • https://cdn.sqhk.co/jusulikipe/cpNc8O5/khan_academy_sat_prep_reading_history_answers.pdf
    • https://cdn.sqhk.co/numavagoko/jdLjedO/deactivate_voice_assistant_samsung_tv.pdf
    • https://cdn.sqhk.co/jaziwuke/1Cicv9I/wafuwewonebe.pdf
    • http://keruluzo.medianewsonline.com/spanish_english_visual_bilingual_dictionary_dk_bilingual_dictionaries.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/5bc2e7ed-393e-49e6-a3e4-1bf01e430bc8/balancing_equations_worksheet_answers_key.pdf
    • https://uploads.strikinglycdn.com/files/40f7106d-3576-463b-9b69-a9c8b99f7c0c/34087290760.pdf
    • https://uploads.strikinglycdn.com/files/72f5b927-659a-4fc1-b9c3-33f34d0019d4/44478433382.pdf
    • https://uploads.strikinglycdn.com/files/28ebc65f-3390-4152-95d6-c4bf0062ed63/56422814661.pdf
    • https://uploads.strikinglycdn.com/files/4380f30f-f273-458f-8294-1354695bdb74/ge_profile_microwave_convection_oven_not_working.pdf
    • http://popofisofol.myartsonline.com/88038288988.pdf
    • https://uploads.strikinglycdn.com/files/0b364f2e-806d-4f1d-b18a-2a67288a9f20/bedejimomimodazinu.pdf
    • https://uploads.strikinglycdn.com/files/43092d56-f148-4e5d-b7b5-14199f7ad3fe/kubezamazimeveza.pdf
    • http://milebulijulami.onlinewebshop.net/92902386312.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000131aa.bin
d423b7bc30507af2990c8315c5abdd858edd19549d9aa78f0aeea9e95eba9e68		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x131AA 18920 bytes
font_00_sfnt_off0000fa1a.bin
bc4f6df2305c4d4a26e30df97b3dfa2105991fd8854ec0f9de228f64766105a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1A 5388 bytes
font_01_sfnt_off00010c9c.bin
004cc6de3b06614ff202be96a77a026dfba204459e84f639742ef26c341e979c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C9C 10876 bytes

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