Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f973a37e6f14f41…

MALICIOUS

PDF

100.8 KB Created: 2021-06-02 13:39:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: ad6d7f24ea9198dd501536b709f70d06 SHA-1: 583c42eb14ee4b3e16609e7ee3053cb439e57e6f SHA-256: 2f973a37e6f14f417538aac468062e1fee92a9df722cd6dda74ee219e410d95d
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a likely attempt to use SEO tactics to distribute malicious content. The presence of embedded URLs suggests the document's primary purpose is to redirect the user to a malicious site, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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 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://pistant.ru/pbw?utm_term=adsorption+mechanism+of+activated+carbon+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408170/normal_602772fab1c36.pdfIn PDF document text
    • https://nadunetuvopalo.weebly.com/uploads/1/3/4/8/134884029/36304650b902810.pdfIn PDF document text
    • https://jabikevemezi.weebly.com/uploads/1/3/7/5/137513024/jomazixojowivuguj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446651/normal_60166292c5514.pdfIn PDF document text
    • https://mitixofixomu.weebly.com/uploads/1/3/4/3/134333727/mowalopuxuwomu-subomejululu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475852/normal_5fd10baa02ddf.pdfIn PDF document text
    • https://rimokukesezawuk.weebly.com/uploads/1/3/1/4/131437069/4076223.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380854/normal_5fe56276850c7.pdfIn PDF document text
    • https://vajasefa.weebly.com/uploads/1/3/4/4/134490273/5693182.pdfIn PDF document text
    • https://jajamavufivaz.weebly.com/uploads/1/3/4/2/134235884/4132454.pdfIn PDF document text
    • https://gabejudunutulan.weebly.com/uploads/1/3/4/8/134887900/188a7045360d.pdfIn PDF document text
    • https://watixure.weebly.com/uploads/1/3/5/9/135991760/93c9f4fa9b.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4413007/normal_60b54f9fcf3c9.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/66890a7e-a207-4f0e-80c8-55bae793f894/4800555145.pdfIn PDF document text
    • http://godekazonigi.pbworks.com/f/banovesowatoterixeropifip.pdfIn PDF document text
    • http://nusuwoxub.pbworks.com/w/file/fetch/144414018/72811182760.pdfIn PDF document text
    • http://faxamom.pbworks.com/w/file/fetch/144473247/64053390196.pdfIn PDF document text
    • http://poxanoralanu.pbworks.com/w/file/fetch/144422268/nufevoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59d20619-d263-4187-aa7c-3e4699f7a582/miduvom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d212fd64-96cf-44c8-a4cd-9b451f097e83/43224566545.pdfIn PDF document text
    • http://gatasulupu.pbworks.com/w/file/fetch/144423036/how_to_cook_sushi_rice_in_tupperware_rice_cooker.pdfIn PDF document text
    • http://xugilip.pbworks.com/w/file/fetch/144501333/teamspeak_3_android_apk_cracked.pdfIn PDF document text
    • http://tukufidanega.pbworks.com/f/summertime_saga_latest_version_mod_apk_for_android.pdfIn PDF document text
    • http://tusoxefum.pbworks.com/w/file/fetch/144475344/32413935573.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/043abc63-3522-46a9-9cf4-2930b585a873/manual_nikon_n90s_espaol.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_off000149ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149ED 5552 bytes
SHA-256: 95347dcaaacfd32f3f3faabdeb30c1c7aae2c3a21ec86da7f3754c219cb368bb
font_01_sfnt_off00015ca8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CA8 13088 bytes
SHA-256: 597645bc782ee549fe29c7a96a0d5d64efc187f3b5f866868228f1a60cbdd416