Malicious PDF — malware analysis report

Static analysis result for SHA-256 11154ee849869769…

MALICIOUS

PDF

81.4 KB Created: 2021-03-29 16:31:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 4e9ecb0b635fda1b4a16406736c2669d SHA-1: c37e4e4923558c012d3f8a5f365433f766722810 SHA-256: 11154ee8498697698a66bed0843b1c846fdb0c707b3a07285c1a7b26f7f80d92
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, many hosted on disposable domains, indicating a link farm designed to redirect users. The document body, though heavily obfuscated, suggests a lure related to 'Menace d' accouchement prématuré pdf 2017'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery via the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://resalured.ru/123?utm_term=menace+d%2527+accouchement+pr%25C3%25A9matur%25C3%25A9+pdf+2017 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4489240/normal_6041e2f27c79f.pdfIn PDF document text
    • http://girameluxo.iblogger.org/go_math_grade_7_practice_book_answers.pdfIn PDF document text
    • http://jofifuneku.medianewsonline.com/51282962035.pdfIn PDF document text
    • https://jasixuruvixu.weebly.com/uploads/1/3/4/2/134234618/buzuwafomuno.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465559/normal_60207a4eb95f0.pdfIn PDF document text
    • http://faripofijukevom.mywebcommunity.org/zalowefimumepudo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413011/normal_60446f235f6ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405197/normal_600a9923e3aaa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463263/normal_60546d9fad839.pdfIn PDF document text
    • https://sagisumofag.weebly.com/uploads/1/3/4/8/134882066/b4a41f228286a.pdfIn PDF document text
    • https://bebiluredop.weebly.com/uploads/1/3/3/9/133987060/pusemeruveruzarajini.pdfIn PDF document text
    • http://moxolesapudeli.22web.org/pegasor.pdfIn PDF document text
    • http://gagapazu.scienceontheweb.net/bush_pin_type_coupling.pdfIn PDF document text
    • https://banetopebored.weebly.com/uploads/1/3/4/8/134874573/b1255.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://680e7e7f-99bb-4309-8a01-ecc910dc7690.filesusr.com/ugd/717a42_b60f38a6cf0d441a9e714ce03f28fcc5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/830fa8eb-ec42-4707-8d11-f59e15fb0319/how_to_use_a_fender_mustang_ii_amp.pdfIn PDF document text
    • http://lorabedujeweb.epizy.com/e1_cross_cable_color_code.pdfIn PDF document text
    • https://7e005a1c-fb68-43c1-af83-b854b6a2d282.filesusr.com/ugd/dcfb95_94029a4fe75d4f63b8ff0c89d8199b4a.pdf?index=trueIn PDF document text
    • http://zovaner.rf.gd/how_to_make_brown_rice_in_hamilton_beach_rice_cooker.pdfIn PDF document text
    • http://gemivaf.rf.gd/bulopurojofop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89d36dad-3a9d-4939-853b-a53349d0cabe/simple_key_loader_help_desk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a857850b-f3a6-4b95-9a69-cd8962c71470/63905521484.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/feabb0a9-c29b-4f1d-aa4c-830968790d86/writing_with_power_grade_6_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9025ea60-8dc4-473a-94f8-45ac9389171b/sparknotes_origin_of_species_chapter_6.pdfIn PDF document text
    • http://kojenixerog.myartsonline.com/general_psychology_test_questions_and_answers.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC14 5608 bytes
SHA-256: baad80369065001491e87b267e2ca1ad65312dfff488c17488453a9e1a873170
font_01_sfnt_off0000fec0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC0 12800 bytes
SHA-256: c68b871459cce10be05d9969f24565a09546322ff1516a5a004ee3d4acc23c8e
font_02_sfnt_off00012753.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12753 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361