Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac02dd2863458fa2…

MALICIOUS

PDF

108.4 KB Created: 2021-03-20 03:17:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 15893b14e35246905a5698b3fc7533cf SHA-1: 258eb884d8fb91a58201f16c2438c36813b4824a SHA-256: ac02dd2863458fa242040af255560ddf3ec70204d995975b84ea1f7d1e85c7e2
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO spam operation. One of the primary URLs identified is https://soxebez.ru/strik?utm_term=consolation+of+philosophy+book+3, which is likely the malicious destination.

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://soxebez.ru/strik?utm_term=consolation+of+philosophy+book+3 PDF link annotation
    • http://kedutugadow.iblogger.org/50435686372.pdfIn PDF document text
    • https://cdn.sqhk.co/vawadawuleja/cWehfDS/margherita_pizza_bel_air_menu.pdfIn PDF document text
    • https://cdn.sqhk.co/rifojimuna/iiigghe/werewolf_the_apocalypse_5th_edition_news.pdfIn PDF document text
    • https://soletobapikod.weebly.com/uploads/1/3/4/5/134582957/2678774.pdfIn PDF document text
    • https://zuxosudeti.weebly.com/uploads/1/3/4/3/134359900/006b32e486.pdfIn PDF document text
    • https://cdn.sqhk.co/daposofoxig/jc7DAjf/movabelibemiteze.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/97de6d07-b485-45c8-a35d-8cbd058ed3ca/harry_potter_and_the_philosophers_stone_book_how_many_pages.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/daa5d525-99b9-424c-beed-d187a303cae3/9643079101.pdfIn PDF document text
    • https://s3.amazonaws.com/sewamos/7081149351.pdfIn PDF document text
    • http://furugavasipif.epizy.com/candle_light_full_hd_video_song.pdfIn PDF document text
    • https://21a67f6d-2aea-439f-a910-ed4feb6be009.filesusr.com/ugd/173616_646f90d75d0944bb8834d5143dd7975c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d34efe6-6eb9-4b3d-99c7-78cfc26dc0cc/sizebal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b23907d-db16-4f97-a00b-006f4f1f71d3/getaduwixaraj.pdfIn PDF document text
    • https://1bf92926-22d0-44a1-94fb-b51843c41cd5.filesusr.com/ugd/762c1a_eb8727c1c3c7400581ea2fd08ee419f3.pdf?index=trueIn PDF document text
    • http://zepedijuva.epizy.com/annotates_windows.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/87018042872.pdfIn PDF document text
    • https://cf176ec6-4820-456b-adf9-61e5f06c968f.filesusr.com/ugd/43d598_0d74f05c06c74c6a8832e99e3b7e6b91.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gurafoga/what_is_the_setting_of_love_is_a_fallacy.pdfIn PDF document text
    • http://jefeduwikiw.epizy.com/wagoboziwubaxefivekuvex.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_off00016e3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E3F 5268 bytes
SHA-256: acf741f2037ed391a46b84c727812b2fbd851b4a5af215c6b7316eccc385c840
font_01_sfnt_off00018035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18035 10704 bytes
SHA-256: aeb56e7e83c54a38cbbf1112543e53a81429f52798d63fb3b996ef61cf0b4627

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