Malicious PDF — malware analysis report

Static analysis result for SHA-256 410d3bff5b513eba…

MALICIOUS

PDF

83.7 KB Created: 2021-09-11 21:28:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 2c4831b2ce448911890f2a4f430a1764 SHA-1: 590133a7f8c4eeb58682d1c511edfc5fc3dfad84 SHA-256: 410d3bff5b513ebaceffa0e3c88fd85b0a81050907a0db7b1ce4a36df593ac66
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ClamAV as a phishing trojan. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a large number of links on potentially malicious or low-reputation sites. While no scripts were explicitly extracted, the nature of the embedded URLs suggests the document's primary purpose is to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9931

Heuristics 5

  • 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 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://cmflower-kkc.com/ckfinder/userfiles/files/lidubilevuj.pdf In PDF document text
    • http://cpgny.com/userfiles/files/67034239272.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16131accd67e38---piwiluxosibafevisobako.pdfIn PDF document text
    • http://costruzionibulagna.it/userfiles/files/83387402339.pdfIn PDF document text
    • http://imosa.asia/uploads/files/202109100942185006.pdfIn PDF document text
    • https://pasifikendustriyel.com/userfiles/file/33885960910.pdfIn PDF document text
    • https://keyseries.us/userfiles/file/fodoxekiv.pdfIn PDF document text
    • http://showdoimovel.com/files/files/gajapitemed.pdfIn PDF document text
    • https://alienaquatics.com/home/gb/public_html/ckfinder/userfiles/files/kezekeserivibisoxebulixa.pdfIn PDF document text
    • https://harmony-lazienka.pl/Upload/file/wivufuduvurasilomasaziw.pdfIn PDF document text
    • https://campermagazine.tv/public/file/49861713693.pdfIn PDF document text
    • http://crm333.com/documentos/file/97986136993.pdfIn PDF document text
    • http://acelybio.com/upload/files/suvotabimotule.pdfIn PDF document text
    • http://nanoservice.cz/upload/file/37239633246.pdfIn PDF document text
    • http://netichikawaya.com/userfiles/file/81123113394.pdfIn PDF document text
    • http://morgancountyoh.com/userimages/25972817034.pdfIn PDF document text
    • http://lagrupacio.cat/file/12793269142.pdfIn PDF document text
    • https://www.sibirprokat.ru/ckfinder/userfiles/files/detazosuguloladimorura.pdfIn PDF document text
    • http://benevolo.it/userfiles/files/16238466171.pdfIn PDF document text
    • https://himalmanpower.com/ckfinder/userfiles/files/wafebajamul.pdfIn PDF document text
    • http://centronegozi.com/public/44790545287.pdfIn PDF document text
    • http://youandisagenix.com/ckfinder/userfiles/files/16335665742.pdfIn PDF document text
    • https://lienlacanien.com/img_pages/file/60014709281.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=phrasal+verbs+with+bangla+meaning+pdfPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c17c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC17C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d98d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD98D 16292 bytes
SHA-256: 57340892af46a162cbdc202f4055c41fd4de01ae6fb9f921a97239b9f67b66ce
font_02_sfnt_off0000efc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC5 21660 bytes
SHA-256: 459886874be25f0356d6883a95f0b8030da290c4bf529610122f5c11094d72cf
font_03_sfnt_off00012727.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12727 11120 bytes
SHA-256: a2aec2c182beae9d9ff9d593f8c132588755d583c2abba988752a8910a9a7611

Open this report in the interactive analyzer, or submit your own file for analysis.