Malicious PDF — malware analysis report

Static analysis result for SHA-256 26a3d58cf64ba029…

MALICIOUS

PDF

82.6 KB Created: 2021-03-19 23:51:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 8d5c1ef082fbb7128d2fde0636f778bd SHA-1: fe06fec30106a4f758f4fcc4383b471239046fff SHA-256: 26a3d58cf64ba0299f6560787c73ab25a7d2b3d3df1410a1f646d767cc32a5c3
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which point to disposable hosting or potentially malicious domains, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. The embedded URLs and the heuristic firings for PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM confirm the document's purpose is to act as a gateway to other potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/award?keyword=destination+b1+pdf+b%25E1%25BA%25A3n+%25C4%2591%25E1%25BA%25B9p PDF link annotation
    • https://cdn.sqhk.co/bogovureg/cjephd6/results_for_champions_league_2020_2021_table.pdfIn PDF document text
    • http://gepopusoka.mypressonline.com/93438217501.pdfIn PDF document text
    • https://zedifetizigofup.weebly.com/uploads/1/3/5/3/135393349/5317884.pdfIn PDF document text
    • https://fuvejewitopi.weebly.com/uploads/1/3/1/0/131070508/2737344.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvazuginu/jcrijlQ/turbo_driving_racing_3d_car_game_download_apk.pdfIn PDF document text
    • http://moradudipomibo.mypressonline.com/game_of_thrones_show_bible.pdfIn PDF document text
    • https://cdn.sqhk.co/xugiwatokax/JjdPyjj/zivusemagom.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/ji9sUja/picosecond_laser_pen_red_vs_blue.pdfIn PDF document text
    • http://damewumesigalut.medianewsonline.com/mandatory_safety_signs.pdfIn PDF document text
    • https://roribevewo.weebly.com/uploads/1/3/4/5/134502196/guwogirunuzozemuzida.pdfIn PDF document text
    • https://cdn.sqhk.co/simikimira/j6Ohihf/ginavu.pdfIn PDF document text
    • https://cdn.sqhk.co/rixosadiv/dk2hgiP/92715024887.pdfIn PDF document text
    • https://cdn.sqhk.co/pananumujo/cghShbp/zisokajal.pdfIn PDF document text
    • https://xavapijiwo.weebly.com/uploads/1/3/3/9/133997403/gosip.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/faluzotixupi/fractionation_action_checklist.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/65501099632.pdfIn PDF document text
    • https://a79fbd7c-12a6-44fe-9d3c-43dc2b0795a8.filesusr.com/ugd/f95141_9feeca4f6df64404b36e95cbbc714165.pdf?index=trueIn PDF document text
    • https://ae26bae5-b1f3-4fb2-a0ba-5d2f2d23988c.filesusr.com/ugd/aec2ea_7ae284513a884b96ae984502693a5a51.pdf?index=trueIn PDF document text
    • http://zubiluwetij.myartsonline.com/toro_blower_vac_parts_51591.pdfIn PDF document text
    • https://s3.amazonaws.com/wovigebi/11921312738.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dab5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB5 5444 bytes
SHA-256: 45f9a5b9edb38c2e1d70fabc3548651c7b702a2100b2da4a5f6b5bc130022b72
font_01_sfnt_off0000ec4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC4F 2836 bytes
SHA-256: c8653877a65bf01cb55ba62b834418e1db782f5de1dcc381fc7fe0b1171ffb3d
font_02_sfnt_off0000f84a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF84A 24504 bytes
SHA-256: c6593d5e5a3a07d242e9f67710db57eb7db5c84fad6a6b414842eb45737a9456
font_03_sfnt_off00012c76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C76 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f