Malicious PDF — malware analysis report

Static analysis result for SHA-256 d043b8ad29de1275…

MALICIOUS

PDF

79.1 KB Created: 2021-05-21 18:03:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 68a0f34eb927593f5f59b443b702a3a6 SHA-1: 562e18281c5e8fee17ebfafb95a618741f7450c7 SHA-256: d043b8ad29de12750db1d72900101fb0935d5aaa69c8ab126605aab742193028
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The document body is heavily obfuscated and appears to be generated by wkhtmltopdf, suggesting it's not intended for direct user reading but rather to host the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://seumenha.ru/strik?utm_term=notitimba+quiniela+todas+las+princesas+son+delgadas PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4416934/normal_5fcd5449ba8d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372087/normal_601901e028549.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408702/normal_601c79654b5e6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387701/normal_5fce8c68100c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460982/normal_601a007988a53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450415/normal_600efe2e995d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387581/normal_605dfc1d5f701.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382780/normal_60655a98ee833.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370762/normal_600ebbf6e64eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530429/normal_605ae818e29f2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481406/normal_60038d27989b6.pdfIn PDF document text
    • http://tandil.olx.com.ar/boleto-loteria-nacional-ano-1967-iid-41402752In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jevopemosod/how_to_throw_bean_bag_toss.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df0e4ca2-0949-4793-8386-e78d6c1e74b7/the_painted_veil_movie_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3704ee1d-7da8-4bf5-bdc7-a5d6d46bb2a4/sixedum.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/screenshot_capture_android_app.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/71827387797.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0622ecef-49bb-4c3a-82a8-f64252cefaab/what_eyelash_extension_brand_is_the_best.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80f3d538-bcdd-4a17-b5a6-c0b2f200adf0/where_can_i_download_romance_novels_for_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b76d26c-3635-475f-85dd-d99fa52f76d8/applied_fluid_mechanics_7th_edition_solutions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e46c6f1-6115-4020-b260-ed2e9e339dc8/how_anti_inflammatory_foods_work.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71837814-b3b0-4d3b-8367-670e8d3d0818/bissell_revolution_pet_pro_carpet_cleaner_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/46501248260.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f5ba593-d27e-4f58-9ae0-7aa44b990b8c/xukanawutunoge.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_off0000f26e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF26E 5628 bytes
SHA-256: 812391754f6854764e1977489bdf651eabeb7eebc510c525925cad36ea31e439
font_01_sfnt_off0001056b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1056B 12244 bytes
SHA-256: e2d8e4ad17e7a02bc875de025f3013f2895cc9aa2d42b00a2a2424f2bdbd52b0

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