Malicious PDF — malware analysis report

Static analysis result for SHA-256 f147c0cf553884b4…

MALICIOUS

PDF

103.2 KB Created: 2021-03-28 17:54:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ce4f56636dcafbe630d00399ee2f4440 SHA-1: 988d89d4ba2c3142c91bc310372871b055a87000 SHA-256: f147c0cf553884b4dd837a6ebff670df9a8749f9297b2a5b3e9f9211ebf0ff1f
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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
  • 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/award?keyword=chhattisgarh+map+city+wise+pdf PDF link annotation
    • https://cdn.sqhk.co/vumusokutil/aOLjfgi/whispering_angel_wine_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/zugivakizo/bqijbNX/rooter_game_streaming_daily_giveaways_videos_download.pdfIn PDF document text
    • http://viwowiziboso.22web.org/agnus_dei_michael_w_smith.pdfIn PDF document text
    • https://cdn.sqhk.co/tunuviju/hb4gdLK/non_conformance_report_form_iso_9001.pdfIn PDF document text
    • https://cdn.sqhk.co/lusimalifa/iighOjd/occupational_therapy_assistant_salary_nyc_2019.pdfIn PDF document text
    • http://mumokajepuxu.iblogger.org/65421838580.pdfIn PDF document text
    • https://cdn.sqhk.co/fugolamudara/hcbGigj/48288790136.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/cc0be43a-aac8-474c-805a-c0852fd5980b/52607260330.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/391714b0-9160-405c-8b45-00e7f83ba579/guzazes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c60e279-faa5-4a07-b76f-509cf73ccb55/kitimonoxesuvomef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7eca6da2-7ea6-44fa-a454-27f6f5d2f4e7/does_walgreens_have_a_blood_pressure_monitor.pdfIn PDF document text
    • http://mulurezo.epizy.com/blockchain_o_reilly.pdfIn PDF document text
    • http://pasibujaz.epizy.com/15850199779.pdfIn PDF document text
    • https://dacf5b84-f80e-4bd8-bb7f-22aad20a1cd8.filesusr.com/ugd/285be4_4200153fc6434495bc5896591b974769.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/15bf2672-f203-4807-8d5b-ee1cf5930cb9/craftsman_dys_4500_deck_parts.pdfIn PDF document text
    • https://748e6e98-33e2-4bd1-95aa-01ea3505a154.filesusr.com/ugd/704f6c_899a41d6a9dc405985595a7d7280de95.pdf?index=trueIn PDF document text
    • http://dovobol.epizy.com/autotransformer_single_line_symbol.pdfIn PDF document text
    • http://ronopijitol.rf.gd/karateka_classic_apk_1._01.pdfIn PDF document text
    • https://82f7a8bd-e2a3-46ec-bdf8-dd4727f017fb.filesusr.com/ugd/a90de3_85b1c122d7cc49ec994d096c028fccce.pdf?index=trueIn PDF document text
    • https://3f735f5a-cd1c-4288-bd93-adeff6e084d9.filesusr.com/ugd/bcc0e4_380a9d9443a842e48292ab9f53d164ae.pdf?index=trueIn PDF document text
    • https://9d1e48ad-bcd7-4831-9b7b-7108443a63b6.filesusr.com/ugd/136d07_4afd098d47174fa294e728ee1937078b.pdf?index=trueIn PDF document text
    • http://xulaxun.rf.gd/prologue_to_canterbury_tales_summary.pdfIn PDF document text
    • https://cb0920a4-0dfc-4587-8161-bd3bf883b043.filesusr.com/ugd/df391a_36b35d167b9d49858f72b194ab4308c9.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013ad7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AD7 5636 bytes
SHA-256: 08362c7946ca6c7141f7f44cf2e68716a492fd6ae92282a3b447613a7d87c1ff
font_01_sfnt_off00014dec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DEC 12460 bytes
SHA-256: dae5ca67a089c96bada8e34f5d5a7f4fe120c98134c69e2cbd87d97093cf2a9c
font_02_sfnt_off00017858.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17858 16164 bytes
SHA-256: 6e3fbd491d8b71441998836ddca0d0c102716a221ea14f8143929167ad9a79b3