Malicious PDF — malware analysis report

Static analysis result for SHA-256 fae8681ad232a4db…

MALICIOUS

PDF

75.6 KB Created: 2021-03-17 23:40:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1c1514d3b759707ffb3e65538e371d06 SHA-1: 8b7093ce48eb15e4271837136988be8537032d98 SHA-256: fae8681ad232a4db06e66a65d88f1d326d91fc97eab0a759ff8356e37a381dd4
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 0.9993

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://lozipotod.ru/wix?keyword=half+steps+and+whole+steps+worksheet+guitar PDF link annotation
    • https://femovoba.weebly.com/uploads/1/3/0/7/130775826/gudabobifen.pdfIn PDF document text
    • http://grafoanaliz.ru/vande_mataram_meaning_in_hindio0fdj.pdfIn PDF document text
    • https://dupazenulejafu.weebly.com/uploads/1/3/4/3/134331878/dalesotizimukob_perudumevozak_severuwoj_vitemij.pdfIn PDF document text
    • https://zetovesejideze.weebly.com/uploads/1/3/1/4/131482946/zurijuxiguzat.pdfIn PDF document text
    • https://cdn.sqhk.co/fabokofe/gfjhgjM/edmodo_student_guide.pdfIn PDF document text
    • https://wopirizebopate.weebly.com/uploads/1/3/1/4/131452778/9509314.pdfIn PDF document text
    • https://fotewusobowo.weebly.com/uploads/1/3/5/3/135339642/3bc56a70.pdfIn PDF document text
    • https://cdn.sqhk.co/dukosisevu/gg22YQE/funny_sad_sound_effects_download.pdfIn PDF document text
    • http://tameeniraq.com/kerukuzar5kqst.pdfIn PDF document text
    • http://dfahsdfgjsfg.online/isn_t_it_romantic_2019_parents_guideu9vf9.pdfIn PDF document text
    • http://nakidki-alkantara.xyz/mivetjvgzy.pdfIn PDF document text
    • http://br1.red/85756020977pyd3a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a68e2ff5-bf17-48e3-82d4-ceb975b85758.filesusr.com/ugd/760101_f7c19fd7cd514695b97b4679630aeaee.pdf?index=trueIn PDF document text
    • https://51956041-da35-40aa-96c1-085c1f47c80d.filesusr.com/ugd/e6e573_551b0d95b37e4b348b27a4fe0da8b2ac.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/punurum/radio_button_onclick_submit_form_php.pdfIn PDF document text
    • https://38c64f87-0506-4925-a3a1-425743e24937.filesusr.com/ugd/386d45_3c655d1fa202468c83acc2592d8e3c78.pdf?index=trueIn PDF document text
    • https://12a3aa02-022d-4218-8efb-90aa4388683d.filesusr.com/ugd/6dfd9b_d883f06728814483b13df70d1c03a7e5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/60930766314.pdfIn PDF document text
    • https://441768bb-9839-4df4-8f78-dd1233b527f6.filesusr.com/ugd/7e6080_ff93368c0cf6404bb257ae68bca4c4a3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wulagisi/maus_art_spiegelman_character_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/daselex/90591705349.pdfIn PDF document text
    • https://5b5cf7c4-d983-4e27-bd54-44d52fc9074e.filesusr.com/ugd/2f9450_dd2a752f9a924ca6873d4dcea2c95609.pdf?index=trueIn PDF document text
    • https://48936d5e-4b15-4059-a328-ddb12afcc15e.filesusr.com/ugd/173145_1d4218d40b8240dead3f8b185a39b283.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e959.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE959 5420 bytes
SHA-256: 1fdf8ce506f44073100d03214299b5c43a6356ed1a3cbaf299156bd65cd3bb69
font_01_sfnt_off0000fbd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD7 10852 bytes
SHA-256: 005838ff528b77f35c37c3cc99984c81cd1d21be18227b8ada8c47cbeabd7c17