Malicious PDF — malware analysis report

Static analysis result for SHA-256 369648f025441bd2…

MALICIOUS

PDF

85.0 KB Created: 2021-04-04 08:58:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c9cacfa38608c6594b5493562da7e16d SHA-1: 52d11e1ebe139419b62f044a0cfa81fdb7b56532 SHA-256: 369648f025441bd213f9bb04149d451edd0e0e590effb8c2d67df5e3f9395059
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains numerous external links, a common tactic for SEO spam and phishing. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic suggest the document is designed to redirect users to potentially harmful sites, such as the identified URL 'https://dugedepap.ru/strik'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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.
  • 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://dugedepap.ru/strik?utm_term=washington+state+covid+restrictions+by+county PDF link annotation
    • https://boliwarabinobe.weebly.com/uploads/1/3/1/4/131437394/vomapimiviripa_tegepaxejuvewox_bapobowuwajig.pdfIn PDF document text
    • http://meetly.space/how_to_download_autocad_2018_free_trialopxpi.pdfIn PDF document text
    • https://kenazago.weebly.com/uploads/1/3/1/0/131070597/9432075.pdfIn PDF document text
    • https://luresigixake.weebly.com/uploads/1/3/5/2/135294948/paribedosini_xevozimokunig.pdfIn PDF document text
    • http://richteam.site/how_to_program_lg_remote_to_soundbarlkbfx.pdfIn PDF document text
    • http://steelsho3.club/discartrosis_lumbarv5l3u.pdfIn PDF document text
    • http://sale50.pro/pafibuxizpvijk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xujitezu/brennen_davis_scouting_report.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/city_of_regina_summer_leisure_guide_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/cant_stop_smoke_alarm_from_chirping.pdfIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/tesoxakizirekilajorariwi.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/canon_mg3222_error_codes.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/tajatufojugulexarixeja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/103e06df-b512-4029-875d-dd3694901d4e/sanuruwekiseli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a11aac5-354a-4778-a318-ac555b78a5d3/what_is_a_valid_argument_logic.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/fried_green_tomatoes_book_author.pdfIn PDF document text
    • https://c5c27394-2042-4749-9b39-d1c24dcbd9f0.filesusr.com/ugd/e9b987_2050a6869460444ca43b380e066a56e8.pdf?index=trueIn PDF document text
    • https://e691ad07-92dc-45fa-af10-8929b4045ede.filesusr.com/ugd/87b9a8_2e5d4dddfd134b4a8b0ab94d80ef0ea7.pdf?index=trueIn PDF document text
    • https://46d16763-6c5f-4e19-aa2c-3f4071fcbec2.filesusr.com/ugd/26f730_3282f4c882374fb294632e1d961f53b3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/47602592607.pdfIn PDF document text
    • https://1094d5c0-a920-47c7-a1de-7e2d56a92d84.filesusr.com/ugd/47b1e8_f2b07880c33540c3bc7152365211c050.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/forupokisip/holmes_and_rahe_stress_scale_criticism.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6541dba-d190-4553-8787-643f9096883b/black_boy_chapter_13.pdfIn PDF document text
    • https://78905da9-dd21-4190-abaa-c894c042e703.filesusr.com/ugd/851c7c_aacf9742970d44569811d782ba04d3cc.pdf?index=trueIn 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_off00010bfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BFE 5484 bytes
SHA-256: 53d6e795adf5bc6f2defee7fe33639507e315cfaf3315b2d26631c4680febb22
font_01_sfnt_off00011eb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EB3 11584 bytes
SHA-256: e3af91cff3bc4518cfbe7f7e6d4298949992972a9ef989395bfd0ee091af8a32

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