Malicious PDF — malware analysis report

Static analysis result for SHA-256 09cc352c01179111…

MALICIOUS

PDF

82.7 KB Created: 2021-03-16 15:52:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 1cfbce5a05df18c2ad8f814cfacb027c SHA-1: 647ab10a71127defe93e3d7edf378fe0980abc16 SHA-256: 09cc352c01179111201ddef646819dcd14b0d22b460822a636eeded56f8b1866
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO link farms or phishing campaigns. The heuristic 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicate this malicious intent. While no scripts were directly extracted, the presence of external URLs like 'https://maypoin.ru/wix?keyword=preguntas+biblicas+adventistas+en+power+point' and 'https://cdn.sqhk.co/ruzaxube/Hiix6jf/jugagunejuzaniketakil.pdf' suggests the document's primary function is to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://maypoin.ru/wix?keyword=preguntas+biblicas+adventistas+en+power+point PDF link annotation
    • https://cdn.sqhk.co/ruzaxube/Hiix6jf/jugagunejuzaniketakil.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzuvazol/hbpjdDa/minecraft_pe_games_online.pdfIn PDF document text
    • https://cdn.sqhk.co/lonogodixi/bWEDgch/28407898194.pdfIn PDF document text
    • https://cdn.sqhk.co/roretuduva/hgFhblp/64766611526.pdfIn PDF document text
    • https://cdn.sqhk.co/vekokizijam/5hgfhfk/bowling_galaxy_hours.pdfIn PDF document text
    • https://cdn.sqhk.co/rogenujudita/fZhdha2/neon_beats_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/koxuzofu/FRidDha/livutezoberaregujigas.pdfIn PDF document text
    • https://cdn.sqhk.co/sawomunuj/giHHjcg/xapojuvezunaputawem.pdfIn PDF document text
    • https://cdn.sqhk.co/kinibemazoz/dIhhhaC/pay_my_express_toll_bill.pdfIn PDF document text
    • https://cdn.sqhk.co/pidodalatip/V6gdgjO/cool_vintage_wallpapers_for_iphone_hd.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/5238ae16-a104-4402-86a5-b3b52a6afc19/nordictrack_t7si_review.pdfIn PDF document text
    • https://34e223d5-b18a-4f89-96b3-7c58aa965d90.filesusr.com/ugd/440e29_b15891b762224d2b9f4e762d71edf8d0.pdf?index=trueIn PDF document text
    • https://4f7f339c-9ee9-4921-a7ad-794169edd555.filesusr.com/ugd/fea72b_18a984a0d9ae4e3ab14527de436967ea.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4de0815-c022-4665-b582-321d71dd805c/57648927302.pdfIn PDF document text
    • https://d8acad56-eb9a-42d1-a06c-a695c5b02328.filesusr.com/ugd/0ad6c7_929d66d8dddb471f967a0022f3a6dfa1.pdf?index=trueIn PDF document text
    • https://ab25a8b3-4d80-4d4b-93a1-c1347014fa7c.filesusr.com/ugd/8d0191_cf6cf00957fe439a903b48d386f11d29.pdf?index=trueIn PDF document text
    • https://07dfae08-e97b-4171-b1ac-1bb43c4ad649.filesusr.com/ugd/b56239_6c16b4ebbc414b5d93e82501146e977d.pdf?index=trueIn PDF document text
    • https://d21da297-2d1c-4020-882f-059d99c29dc9.filesusr.com/ugd/3724a2_1528677f45ba49d7ae682d3731b1af32.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3031c3bd-4613-496c-b13c-9b898db68fb7/6412275239.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70eb8e5b-e946-4896-8be9-cd1c75368c17/kugeminikowopipozeli.pdfIn PDF document text
    • https://677f84e8-2a3b-482a-8721-58d714100356.filesusr.com/ugd/086aec_2ad4aa6ec9984e9f8fe7ddff8fac98e5.pdf?index=trueIn PDF document text
    • https://081e7fb2-604d-424b-9b75-a58d54a71a44.filesusr.com/ugd/abd6ea_ea3b87409bef49e6a332c227fc07d74b.pdf?index=trueIn PDF document text
    • https://18b62485-dce0-4e35-9712-b1d1f13fcb23.filesusr.com/ugd/296484_704876b8981647a4828a3636bcd79b54.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7856b44-540b-4365-80e0-6064b35ec5f7/40381691451.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_off0000ffac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFAC 5532 bytes
SHA-256: a70c5bdde8bd5913c75d6ab16d9a1ac3b8b0b853ae2a33ab44f6c66deec4126e
font_01_sfnt_off00011295.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11295 12616 bytes
SHA-256: 7b5752ebae95215e4efc9d65bac8d62348a5f52c4194654da6720b63d3f8bdec