Malicious PDF — malware analysis report

Static analysis result for SHA-256 f25e7d6a2ad7cecd…

MALICIOUS

PDF

82.0 KB Created: 2021-06-12 03:43:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 159da2182462b5a04edc40f9366e821c SHA-1: e14e633a87b7cde0f6f5e0af49af1324ce3f2b84 SHA-256: f25e7d6a2ad7cecdc8f2758b055d86b66c09bb13e2fee12039184fbb31acd199
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to other PDF files, suggesting a link farm or redirection mechanism. The presence of explicit content in the URL and metadata, combined with a high ML classifier score and ClamAV detection as 'Pdf.Phishing.Trojan', strongly indicates a malicious intent, likely phishing or malware distribution. No scripts were extracted, but the overall structure and URL patterns are indicative of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://irlanc.ru/pbw?utm_term=mother+daughter+lesbian+clips
    • https://kikitepolo.weebly.com/uploads/1/3/4/5/134514310/tininebotuzisu_wemedebo.pdf
    • https://static.s123-cdn-static.com/uploads/4367000/normal_5fe2f9a76d5e3.pdf
    • https://static.s123-cdn-static.com/uploads/4386593/normal_5ff6a9256dbca.pdf
    • https://cdn-cms.f-static.net/uploads/4392451/normal_60362f65c2075.pdf
    • https://sobomimaseneke.weebly.com/uploads/1/3/1/3/131379860/595685.pdf
    • https://static.s123-cdn-static.com/uploads/4472775/normal_6009182e42cff.pdf
    • https://mujugoseboli.weebly.com/uploads/1/3/4/3/134312554/e3a670.pdf
    • https://wunogalabapa.weebly.com/uploads/1/3/4/6/134603674/696e22abff1fa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gaxezuv.pbworks.com/f/79604630044.pdf
    • https://uploads.strikinglycdn.com/files/c2f43a4b-0226-439e-b426-e8d9a5d370bc/rimapil.pdf
    • https://uploads.strikinglycdn.com/files/cc31ae57-2374-4014-aa7d-9b3377b98615/60386772793.pdf
    • http://pekazaxe.pbworks.com/f/mipalo.pdf
    • https://uploads.strikinglycdn.com/files/59c74a0a-8096-4465-8abb-7181a466ea9c/10633805020.pdf
    • http://lawerusemepe.pbworks.com/w/file/fetch/145161777/napudadopu.pdf
    • https://uploads.strikinglycdn.com/files/13532015-53ac-4b19-b18d-0e0966f1d539/39842790707.pdf
    • http://kigiputilik.pbworks.com/f/532368196.pdf
    • https://uploads.strikinglycdn.com/files/b9f7707c-f339-4534-b9d8-b2f7243b7749/is_the_myer_briggs_test_accurate.pdf
    • https://uploads.strikinglycdn.com/files/b4235d71-ab41-4a2d-b0be-875f2a6423ae/84400902815.pdf
    • http://pezaloribed.pbworks.com/w/file/fetch/144628806/defensa_siciliana_variante_dragon.pdf
    • https://uploads.strikinglycdn.com/files/a74025bb-6fad-4d60-8733-eb215faaa75d/nesco_food_dehydrator_manual.pdf
    • https://uploads.strikinglycdn.com/files/ca901208-292d-4a70-940d-9eefe946e5e9/common_core_standards_michigan_kindergarten_math.pdf
    • https://uploads.strikinglycdn.com/files/7f3ae075-c13d-4e8d-a8ba-d66da6538c71/16716758548.pdf
    • https://uploads.strikinglycdn.com/files/06aea1aa-c821-40b0-bb88-673d798a1a00/ikea_malm_bed_instructions_with_drawers.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fec5.bin
69a84eebd916a6cb52ad16e57ff7d19c9fb7561ce8b9200c96f68ce416f99da6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC5 5480 bytes
font_01_sfnt_off0001116a.bin
2d07d0043a9d8da7992412794c1f6515ad0bd98f4c5e7b4b6df621cfc79f1777		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1116A 11448 bytes

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