Malicious PDF — malware analysis report

Static analysis result for SHA-256 38e3085c078dd8b0…

MALICIOUS

PDF

107.2 KB Created: 2021-06-03 03:36:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 8a5c9834039ccfa531d01c029fc5fe00 SHA-1: 858cc7fe1b195bd6742ade93695c14a57642bb77 SHA-256: 38e3085c078dd8b037941aa80aaecf18597fab4939667ff89001d64f8a98fa38
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://crysiq.ru/pbw?utm_term=map+of+europe+pre+1914', which is likely used for phishing or to download a secondary payload. The document body, though heavily obfuscated, suggests a lure related to historical maps.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://crysiq.ru/pbw?utm_term=map+of+europe+pre+1914 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4425723/normal_606ae7c469d31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377706/normal_60350351aa62b.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/feb47bd4-4d66-473e-b722-106d651f3ba2/vuvanekubofuxavowi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b97dac9-8a83-430b-bc89-e59c17f15dd5/do_you_capitalize_season_with_year.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0ffed7f-2c17-4cf9-8453-81a2a3e31535/what_is_diffusion_of_innovation_model.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b1c3a1f-cb90-443c-9e62-337df1534149/why_is_there_a_limit_to_trophic_levels.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81842e98-401f-4130-83e2-2b5947cb047a/66778007175.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f529579d-d78e-48fd-bb5f-8a1bb27d0cee/86706080251.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5a345c7-bb46-4136-806f-5e751d53f665/44416106303.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/293cbcdc-66bb-4887-b3fc-60df5744e7b7/52605034200.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c2d9d37-6c05-478c-91a7-93f787803f0e/how_to_replace_drive_chain_on_craftsman_snowblower.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff8d9373-d5de-42b4-b6bf-00d2ca911e95/wevugikorariku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1df6ddf-e492-402c-89cb-8903a8df63fa/44378275325.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f729224d-743f-450e-a4a2-3fd49f67c51d/76414983924.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e92c7a99-4ab6-4f10-90be-bc217a7128a8/65839380251.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc1c51fb-b4dc-4e98-8c9d-09673ffa351c/90439478643.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/902d16e8-f07a-41e4-8cb9-323ff34fb97e/4202250300.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb7c7f9c-1cb2-4275-8f24-307160bb0c52/munajaredif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b920b7f6-16dc-430d-aa91-52c585d1c08c/76006630607.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d613102f-ae1c-432b-a73d-4fef8995b20e/kizikumuzebu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebaa27d5-1656-4382-a4c6-0f4243f92157/english_speaking_course_lessons_in_punjabi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1654a0e1-baf9-4a52-ae3f-36475f8d235a/how_to_stop_round_ligament_pain_in_pregnancy.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_off00016571.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16571 4984 bytes
SHA-256: 4dfbe9698cb31efc778fe2f5fb8953f74f5b55fc64be7cb40ddfe6eee9b2631e
font_01_sfnt_off0001768f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1768F 12216 bytes
SHA-256: 03a73e8a0dcf54d26fac840832312ef4b2607f5cf5224287e58c52a6859806ae

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