Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b2b36fb87026a7d…

MALICIOUS

PDF

77.6 KB Created: 2021-06-06 01:52:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 4ad56affda7ae75ad722913f36346d46 SHA-1: 08c0ddcdd53c3f8f753a1831139aef485b1f36e4 SHA-256: 9b2b36fb87026a7d4e609f8ceccef317ca026cb0c208f715fd23e58767668f6e
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing operation. The primary malicious URL identified is https://drafthe.ru/pbw, which likely serves as a redirector to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9775

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://drafthe.ru/pbw?utm_term=how+to+calibrate+superior+mini+digital+platform+scale PDF link annotation
    • https://kojemugolipoxo.weebly.com/uploads/1/3/4/7/134729864/gifirigiwurapafoz.pdfIn PDF document text
    • https://luwujapi.weebly.com/uploads/1/3/4/7/134751522/wunalibomolo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1062593d-92bb-4989-ae90-51c98aeefb0d/how_to_change_the_oil_in_a_craftsman_riding_lawn_mower_lt1000.pdfIn PDF document text
    • http://jozeluwofe.pbworks.com/f/download_minecraft_java_edition_apk_1.15.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89c5498f-02fa-4ecc-82fa-43f6b98fbec3/sex_on_the_beach_drink_recipe_shot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e4e0b01-710a-4272-a348-87ae04ef982e/really_really_play_synopsis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b566645-4349-4bca-999a-8d91959dac38/bavisiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ccbfdd4-af9c-44a0-9da2-10377e8d75c6/how_to_check_wire_transfer_status.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5eae3a55-e5b8-4c4c-b631-282a2e6b6ac3/windows_server_2012_end_of_life_dates.pdfIn PDF document text
    • http://memofemovo.pbworks.com/w/file/fetch/144478635/56777693365.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ada748e6-69a9-4c34-8fbf-4b900149b864/omron_walking_style_pedometer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b11bca98-36bd-4a90-b6df-376e70d8b9f7/does_costco_sell_mask.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70535238-ead4-415b-ba25-c58cdb510079/mitesadatab.pdfIn PDF document text
    • http://liguduper.pbworks.com/f/59381262819.pdfIn PDF document text
    • http://bupataved.pbworks.com/w/file/fetch/144427818/jekuvasapan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6ed41ca-b639-450b-8345-f61eb5801dbe/wevurefiguwodofusepepag.pdfIn PDF document text
    • http://bemulopawed.pbworks.com/f/adobe_premiere_pro_cs3_setup.exe_free_download_64_bit.pdfIn PDF document text
    • http://wemilamozede.pbworks.com/f/51085899670.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b8a2243-4357-46de-bcd6-c7cc3a2dcd97/how_to_embed_poll_everywhere_in_powerpoint.pdfIn PDF document text
    • http://silasofinat.pbworks.com/f/capitale_de_la_douleur_paul_eluard_explication.pdfIn 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_off0000fa79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA79 5668 bytes
SHA-256: d05d69122da70e71f8194c3f7c76778fc51f930bca4e8d93a1f6344bb0654059
font_01_sfnt_off00010db6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DB6 11628 bytes
SHA-256: 4f8a024ebee49a3b372b8ea32174cef3002dc15f46f6a5a8807d7c09f6d5ec6d

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