Malicious PDF — malware analysis report

Static analysis result for SHA-256 02ff6bcd00cb0088…

MALICIOUS

PDF

77.8 KB Created: 2021-05-30 11:05:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 5f6dbecf94f76e2df088e7c80cbec012 SHA-1: eaf11fc3b6e9e7252cfb8cd21c9a9998f41b6f54 SHA-256: 02ff6bcd00cb0088fd59cbaf64d3b76802a3860f5462e32fe4130c21308038ee
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV as a phishing trojan and ML classifiers. It contains an embedded URL pointing to a suspicious domain, which is likely used to deliver a malicious payload or phish for credentials. The document body is heavily obfuscated, but the presence of the external URI and the high risk score indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://midufefew.ru/strik?utm_term=best+outlook+calendar+tips PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369329/normal_60405138b219f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390999/normal_60664c11e9266.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453117/normal_6022733288f0d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393911/normal_5ff8b21a2308f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500674/normal_5fd650f6b9fe9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391954/normal_6034ec4054b68.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487197/normal_5fe242f25ef9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422918/normal_601dc97f9eb5b.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/55337259-ce47-4f05-ad9c-a4908fdcb2ea/hitman_blood_money_widescreen_fix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/866a086e-d213-43c0-b9e4-2fbe63c2d103/gexojuxowerexozin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d76bd51b-1d4d-4f04-8fe1-571db59f00c5/is_ge_advantium_worth_it.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/daaf1da1-5104-42a9-94bc-bb5e4f70f732/word_formation_exercises_with_answers_for_class_8.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31179f6d-6f73-4dc8-83f8-161da647a8ab/cabelas_heavy_duty_meat_slicer_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3000eb0c-b7c1-415c-b6ab-622f04f29275/vizio_e370vl_remote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8b1c779-de19-4809-b545-38b6034b169d/48985948105.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38f59ce7-ea54-4965-a90c-6452296f091b/how_to_install_canon_pixma_mp495_without_cd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d0e6f24-9736-4644-8ad1-8a9a4e3e7c54/buvit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26d5d310-0405-4b73-b898-b40561eade72/best_book_to_study_data_structures_and_algorithms_in_java.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbe49a90-f116-4e69-a7c2-0ae79ee70952/zibatekitezolit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c068bc10-b6ca-490a-9f80-07fb9c489baf/xobepikuwumex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96a19b08-2e01-4c0e-b67c-a70109597ad2/kataxotomojutolez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f92fd6bd-8453-4fad-a56a-17eb4ce6b8b8/64636160995.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93431912-95e0-49ea-9e92-eaa819cc7c06/6268940116.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f7fdc6b-e1ec-43cd-9bbc-33b0a204e525/bunulozivufuwis.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_off0000f2df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2DF 5180 bytes
SHA-256: 6a898858a757427fc0f02e7fc72a09dd65effe270fbac9d89a6b69a8721eea2d
font_01_sfnt_off00010490.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10490 10824 bytes
SHA-256: 6d06ee0a8b6af9b8f17bb451b88e94ef0ed0d587c456b80e2f2c33497289264e