Malicious PDF — malware analysis report

Static analysis result for SHA-256 3371228888819f67…

MALICIOUS

PDF

79.2 KB Created: 2021-03-20 22:08:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 84f8a9e0f69d7048c7ba99f5c3503348 SHA-1: e4a9971b05c93076f0a8970a0d9ff39dcd6efc93 SHA-256: 3371228888819f6781abd6b78760e5bbeb6ec9bb563525be0bbb7fc6cbbb5b4d
96 Risk Score

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. It contains an embedded URL pointing to 'golowaki.ru', which is likely used to redirect the user to a phishing or malware-hosting site. The document body appears to be obfuscated or corrupted, but the presence of the external URI and the overall malicious verdict strongly suggest a phishing or malware delivery attempt.

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://golowaki.ru/wix?keyword=how+to+fastboot+mode+micromax+q402 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4413244/normal_5fe3386007828.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453553/normal_6016c128e95c5.pdfIn PDF document text
    • http://tegor.xyz/zotulud12rv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419851/normal_602a8eb93e15d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392872/normal_5fd082f584aee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464877/normal_6046c6218b516.pdfIn PDF document text
    • http://helpverifybadges.com/lurisowokefulogavo7nh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368235/normal_60494cf02cf59.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378383/normal_600317ff02066.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/495ab731-d87d-4ab2-aa1d-47e755475fc4/38113261156.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02a7368a-895a-486d-a84a-d0be54e57357/helter_skelter_an_american_myth_online_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a5f8b85-78d2-4367-a164-24a6e736ac1e/gobitopo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a967f7fc-3422-47c0-85cf-5fa46c5bc5e4/2013_ultraslim_docking_station_firmware_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4dfa155-e851-4fe5-a77c-d3004da04c0d/gabriels_inferno_part_4_passionflix_release_date.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/191b5f2f-5ddc-4348-9ad0-b5a289590755/what_is_a_caring_person_called.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75d38251-fec2-4463-858b-75dcbf3a9df5/how_to_write_a_quote_someone_said_in_an_essay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cab981f-a000-437f-8b76-f49ea1dae188/ergo_360_omni_mesh_carrier.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cf2c210-6483-4652-bd14-770733fd2d4e/sowiz.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_off0000f408.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF408 5884 bytes
SHA-256: f530d4db2a42840d9e4e891849943cf00ff34d8e7f38a80ee5d3001f996e1aa7
font_01_sfnt_off0001080f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1080F 11164 bytes
SHA-256: cf821d406e67a3f42c266e08bda29043827ce0b01711bce4fa3f2f84d41ab265

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