Malicious PDF — malware analysis report

Static analysis result for SHA-256 02b5d0b7b2a04a73…

MALICIOUS

PDF

70.3 KB Created: 2021-02-23 05:35:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 2003e6842e90c07049354985cfbdbfbc SHA-1: a50571a165d456ecfbd677bdd51bf83d3873a052 SHA-256: 02b5d0b7b2a04a73c349a95d1cb784cc43c78e6778b10fe4e07452e0820b048a
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. The file contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains text related to budgeting books, likely serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/strik?utm_term=best+budgeting+book+for+beginners PDF link annotation
    • http://lofuzuwe.22web.org/bomuwejawigefa.pdfIn PDF document text
    • https://cdn.sqhk.co/lomasamube/gfeEtjc/86816668642.pdfIn PDF document text
    • https://jukovuwivoxufab.weebly.com/uploads/1/3/3/9/133997180/f47890d7a143.pdfIn PDF document text
    • https://wisetigu.weebly.com/uploads/1/3/4/3/134357320/382b235880e655a.pdfIn PDF document text
    • https://cdn.sqhk.co/torixugajo/Hhgiezh/download_game_home_design_3d_mod_apk.pdfIn PDF document text
    • https://giloxegikejuzun.weebly.com/uploads/1/3/4/7/134712531/b9a6b5.pdfIn PDF document text
    • https://cdn.sqhk.co/sawibevas/ehbsibF/weed_leaf_png.pdfIn PDF document text
    • https://gipulafu.weebly.com/uploads/1/3/4/4/134442702/panupi_nixemunaxikel_vovamalepan_sabelinobadudit.pdfIn PDF document text
    • http://easy-money-cash.space/fawivoxujokemejb7oj7.pdfIn PDF document text
    • https://kasipuxatupar.weebly.com/uploads/1/3/5/9/135966953/giwamujugivusodeb.pdfIn PDF document text
    • https://dasezakam.weebly.com/uploads/1/3/4/8/134883145/7128756.pdfIn PDF document text
    • https://cdn.sqhk.co/zotenejek/hdjegfG/remuxuburatebi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wereguvepowu.epizy.com/witameje.pdfIn PDF document text
    • http://jigujirew.epizy.com/lords_mobile_f2p_trap_guide.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_off0000d6e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E1 5084 bytes
SHA-256: c91c95a2d09ae7c2b3c4446564de6692b4f3add63b7e6ca60989d9e7bde39e6b
font_01_sfnt_off0000e848.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE848 10652 bytes
SHA-256: fd37ed89baf69e61984036767ef45d8d8d5cbe03bca29d697715fd0e46baafab

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