Malicious PDF — malware analysis report

Static analysis result for SHA-256 f24e0b4b99355c66…

MALICIOUS

PDF

73.8 KB Created: 2021-03-29 16:12:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da6f7731f38816b325a2e55c7146aff1 SHA-1: 199942d18af103d34e65455fe3ca20b6c27dab11 SHA-256: f24e0b4b99355c664946def7dd48cb0b44f9a28711decf872c04576240fed98a
156 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting an attempt to manipulate search engine results or redirect users to potentially malicious content. One of the embedded URLs, https://ponafet.ru/123?utm_term=chura+liya+hai+dj+remix+song, is flagged as unknown reputation, and ClamAV detected the file as Pdf.Phishing.Trojan. The document body is heavily obfuscated and contains metadata indicating it was generated by wkhtmltopdf, a tool often used to create PDFs from web content, which could be leveraged for phishing or malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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-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://ponafet.ru/123?utm_term=chura+liya+hai+dj+remix+song
    • http://metalllift.ru/the_pit_and_the_pendulum_reading_guide_answerslpgrb.pdf
    • http://rabiwitijif.medianewsonline.com/mcgraw_hill_10_act_practice_tests.pdf
    • http://internet-babki.ru/96974163257njeyd.pdf
    • http://folejaf.mypressonline.com/9th_avenue_bistro_menu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fusopoxipo/wow_queen_azshara_heroic_guide.pdf
    • https://uploads.strikinglycdn.com/files/54e7e320-d53e-429d-8cca-7b9d5e1efbfa/fanoduxiratuxupep.pdf
    • https://s3.amazonaws.com/kosamupim/70368059923.pdf
    • https://39c1d623-eccb-4af0-a86a-15328a2d61f9.filesusr.com/ugd/3cb6cb_3841a55f1bcb4d5c985cf16ab968bb7b.pdf?index=true
    • https://uploads.strikinglycdn.com/files/669b4be4-b6ff-435e-b6cd-e8d7e369f41f/ketomagebajukibi.pdf
    • https://c6f55193-7475-4343-97dd-33cb3b141b6a.filesusr.com/ugd/808d8c_ca142ec7d9c549c08a61a2f430461cf5.pdf?index=true
    • https://s3.amazonaws.com/jasipefulaxiduj/cleartext_traffic_not_permitted_android.pdf
    • https://s3.amazonaws.com/miledu/fovakasil.pdf
    • https://s3.amazonaws.com/xijuxosisomuna/delaware_solid_wood_platform_bed_frame.pdf
    • https://s3.amazonaws.com/jazofi/ways_to_use_formative_assessments_in_the_classroom.pdf
    • https://uploads.strikinglycdn.com/files/e6086450-a007-4485-bafe-38375ffe39fb/fluke_intellitone_pro_200_not_working.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_off0000e239.bin
cc441ec6a2a8801a6f52d1211072ee29138b580ba3e492b02d13b57479bee6cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE239 5392 bytes
font_01_sfnt_off0000f46a.bin
039221fdc8643dca8ee3b392927073642308ef3f12ec7579024c1014c89cab1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF46A 10740 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.