Malicious PDF — malware analysis report

Static analysis result for SHA-256 395bfbadab3fca90…

MALICIOUS

PDF

93.8 KB Created: 2021-03-11 18:22:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9744a6ac730eacc6d9051e7bbdea7f96 SHA-1: 105bc8aaa0b38be11183c454f35b5854bf92e102 SHA-256: 395bfbadab3fca90777d2e676818df739cf7e81083d5b5b45e1a35333a8131ec
104 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and a machine learning classifier, indicating a high probability of malicious intent. The presence of an external URI pointing to 'dafemum.ru' suggests the document is designed to redirect users to a malicious site, likely for downloading further malware. The 'SE_DOWNLOAD_BUTTON' heuristic further supports the phishing lure attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://dafemum.ru/123?utm_term=android+copy+sqlite+database+to+sd+card
    • https://static.s123-cdn-static.com/uploads/4418399/normal_5ff9afd0bdc01.pdf
    • https://cdn-cms.f-static.net/uploads/4503874/normal_5fd198bfa9ccc.pdf
    • https://cdn-cms.f-static.net/uploads/4403560/normal_601d0e95b6949.pdf
    • https://cdn.sqhk.co/vimewiki/4jjCjio/altlife_life_simulator_apk.pdf
    • https://static.s123-cdn-static.com/uploads/4402262/normal_5fc710d300c56.pdf
    • https://static.s123-cdn-static.com/uploads/4469359/normal_5feff07d39586.pdf
    • https://cdn.sqhk.co/vujenibolo/i8yMLja/dojaku.pdf
    • https://cdn-cms.f-static.net/uploads/4373522/normal_5fd7bcd4e78fd.pdf
    • https://cdn.sqhk.co/tatogevi/geZXlXn/voice_recorder_and_editor_for_windows_7.pdf
    • https://cdn.sqhk.co/zepipawetopi/gggcAji/43258709379.pdf
    • https://cdn.sqhk.co/rezebarowed/cib7Vjc/aptitude_questions_and_answers_for_tcs.pdf
    • https://cdn-cms.f-static.net/uploads/4467286/normal_5fe8796a22d9d.pdf
    • https://cdn-cms.f-static.net/uploads/4495997/normal_60397e31c1fda.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/gopifu/personality_types_that_dont_get_along.pdf
    • https://d102a0f2-001f-4998-bb0a-88ac30ac05b5.filesusr.com/ugd/771ea4_308927535c35402286996c7f02d07295.pdf?index=true
    • https://a2ae8793-a99f-480d-a3bc-849ef63d34f7.filesusr.com/ugd/cc207a_22adb419b12e40138be890643279c3bd.pdf?index=true
    • https://uploads.strikinglycdn.com/files/17bb1dd3-6d9e-4030-8d53-480e8586b51e/book_of_acts_each_chapter_questions_and_answers.pdf
    • https://156bb51f-0b62-477f-88ca-8620af00812b.filesusr.com/ugd/e3ff21_dd0cfba7d040437bb57674acfe3e67d2.pdf?index=true
    • https://0ca3454e-05ac-49fc-8d00-644b1af7be3c.filesusr.com/ugd/8bf3fc_f04ea094d2954092aecfdedb685d18b6.pdf?index=true
    • https://uploads.strikinglycdn.com/files/72932f3c-7b9d-44e3-abcf-ad87000dc88a/92808724457.pdf
    • https://uploads.strikinglycdn.com/files/fe2b5abf-ae56-4001-bfd2-809d56501cf4/lazonadobisaxozif.pdf
    • https://s3.amazonaws.com/jazofi/rikafapipaxemikazix.pdf
    • https://uploads.strikinglycdn.com/files/1635426c-a5bf-43ae-b6ef-87f865eb2d3f/how_to_change_a_door_seal_on_a_front_load_washer.pdf
    • https://fa53e508-d88d-41cb-897c-7a5b6f1bfcc3.filesusr.com/ugd/361045_841a3801077d49b18a53b53dc8ca9712.pdf?index=true
    • 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://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011fe4.bin
0fa847a11d6478240f30c72af8140e8d8a75845acf642f1bd4a653199cb11a82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11FE4 5212 bytes
font_01_sfnt_off000131a0.bin
21297bc6e144465ee4f9fa12bcd6388c0e5d33480d6ecb1b5f19902350e9ba92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x131A0 13024 bytes
font_02_sfnt_off00015b9a.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15B9A 4324 bytes

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