Malicious PDF — malware analysis report

Static analysis result for SHA-256 17d9301933aae02a…

MALICIOUS

PDF

79.8 KB Created: 2021-05-25 06:48:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 6df0c9bf8145e0a33b7c2e746d23d173 SHA-1: b3ecc8d91a9b9bab55fc48d5a583b526fba78193 SHA-256: 17d9301933aae02a1ce79a291eff4154a78e5c4adb40b9519f7968652b7c64d9
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting services, indicating a link farm designed for SEO manipulation or to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://jacksth.ru/wb?keyword=how%20long%20to%20cook%20sweet%20potatoes%20on%20grill%20in%20foil PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4499329/normal_604894f0c4fbd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381976/normal_6063516f6b69a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475571/normal_601baa2747a19.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481058/normal_601eaade15fed.pdfIn PDF document text
    • https://gefedotozowane.weebly.com/uploads/1/3/4/3/134395864/fejigulegef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408009/normal_5fe0aa11d99ff.pdfIn PDF document text
    • https://fisadurubimu.weebly.com/uploads/1/3/1/4/131409264/9496413.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476766/normal_601d703b4a413.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408461/normal_5ff9c1878a262.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403816/normal_5ffc87f910ee1.pdfIn PDF document text
    • https://muzunamarufo.weebly.com/uploads/1/3/4/4/134463020/ridolinogetomavo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370265/normal_6029a74799113.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374843/normal_5fca378ea599b.pdfIn PDF document text
    • https://labimatejodo.weebly.com/uploads/1/3/2/3/132302966/tutepetejeginojiruzo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374024/normal_5fe9fc2467387.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424666/normal_6058d6d895aa8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494889/normal_5feffb63739fc.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/mesixadelomomo/teri_meri_kahaani_wapking_song.pdfIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/wuwowinagu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/542c775d-18d9-4c10-bbf1-ee98c4784741/rajewerogexiwelotukinuzus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2d277f9-a34e-4e09-81c3-3fb7e79fbd64/79390455779.pdfIn PDF document text
    • https://s3.amazonaws.com/naxozelozude/9410941440.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12ff62b9-cc3b-4194-b20a-7fd1bdac97af/sq8_mini_dv_camera_setup.pdfIn PDF document text
    • https://s3.amazonaws.com/veraxawewib/creep_radiohead_piano_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c8b11d5-04b9-4677-a552-f46c05045917/how_to_turn_on_samsung_without_remote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b1ad876-821b-491c-bcb6-2410cc18003f/did_michael_corleone_kill_fredo.pdfIn 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_off0000f998.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF998 5300 bytes
SHA-256: 62c2480e4bb44dbe8c63c7c7b33d952a5650b28ad0641bb78505952517311a2a
font_01_sfnt_off00010bcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BCC 11084 bytes
SHA-256: cb1a13ce8ddfeb5f6d01656ecb7d21596aa3867f86266baddf9d0c3da0013350

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