Malicious PDF — malware analysis report

Static analysis result for SHA-256 113dbd3a110454e4…

MALICIOUS

PDF

80.2 KB Created: 2021-04-29 06:14:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 2e8e035767b6cf749dacf3604d73473b SHA-1: 6318109e4438781bf7a26c86794a7649d8ade169 SHA-256: 113dbd3a110454e45a8fb413718d52f1b2b4053e8585d388d1f66718fba951ef
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous external links, many pointing to disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, contains text related to a movie title, likely a lure to disguise the malicious intent of directing users to external sites like 'lozipotod.ru'. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/strik?utm_term=robin+hood+prince+of+thieves+1991+full+movie PDF link annotation
    • http://realwockyc.info/tag_and_bink_onlinewpd38.pdfIn PDF document text
    • https://ruzudewalaxuge.weebly.com/uploads/1/3/4/4/134497745/23da8.pdfIn PDF document text
    • https://cdn.sqhk.co/ditetona/jexjbhd/among_us_wallpaper_aesthetic_red.pdfIn PDF document text
    • http://inglassrus.ru/gender_trouble_bookxw71y.pdfIn PDF document text
    • http://uggi-ugg.com/323729612993xrwn.pdfIn PDF document text
    • https://vamekatowozi.weebly.com/uploads/1/3/0/8/130814347/suravopuxogigujumi.pdfIn PDF document text
    • https://cdn.sqhk.co/pogezasamu/dLlGvpa/67238159954.pdfIn PDF document text
    • https://nolaxefipox.weebly.com/uploads/1/3/4/7/134740184/6252395.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/673077a2-25a7-48d0-b1a1-b9bb82fe0d4d/how_much_do_ziploc_sandwich_bags_weigh.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c11e360-a437-492a-bfd9-5ad060f767f7/where_is_the_limit_switch_on_a_coleman_furnace.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/91101446439.pdfIn PDF document text
    • https://e82ff0bd-cb1a-4782-8b92-0a0fb7657660.filesusr.com/ugd/d17951_b81c8a575edd4f78a21b13c7b0293e6d.pdf?index=trueIn PDF document text
    • https://71da2aa5-51c3-4f2c-ab18-08bbbad20131.filesusr.com/ugd/d216cb_792a1b5debfd44c1a2233e368e270683.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/libeganot/19894705039.pdfIn PDF document text
    • https://d920bd67-dfaf-4c99-85b0-fcb8118dfb91.filesusr.com/ugd/383849_ec177a2b4a8d474ba752fbd87f38ef41.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/firudegix/le_comparatif_et_le_superlatif_franais.pdfIn PDF document text
    • https://167c2301-eccc-4e3a-a609-38a4f17b9bf8.filesusr.com/ugd/b1dabf_cadd84ee53504004b26782c7e118ab33.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc5b6fde-832c-4d78-90ba-13920ce250d8/papojonuvef.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_off0000fabd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFABD 5600 bytes
SHA-256: 06e1d070745b33baa4781390739ae4e15eb941f0269befef23f27445127cffd2
font_01_sfnt_off00010dac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DAC 11012 bytes
SHA-256: 08a9d35f1b800f04a4c85726b4eb88a65beb6f789d3305ea617e4b109090fa58

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