Malicious PDF — malware analysis report

Static analysis result for SHA-256 149d1d26390d1d7f…

MALICIOUS

PDF

83.3 KB Created: 2021-09-21 00:21:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 82d040f6394bce2a2595a428dfb4c55c SHA-1: 4b073e198e3b722fa19edf6d3de86d465cee2fc7 SHA-256: 149d1d26390d1d7f7e81d1d869f6fb1ce6668b9221e82b8b0f60f21dae23d694
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including ML and ClamAV, indicating malicious intent. It contains numerous external URIs pointing to potentially malicious domains and an IP address, suggesting it functions as a link farm or a distribution point for further malicious content. The presence of embedded URLs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://irlanc.ru/uplcv?utm_term=adventure+time+ski+safari+apk+mod PDF link annotation
    • https://biholka.cz/uploades/userfiles/file/12065555111.pdfIn PDF document text
    • http://atol-res.pl/uploads/file/wirarokujilijopu.pdfIn PDF document text
    • http://178.62.148.222:300/ckeditor/ckfinder/userfiles/files/xuzuvodijal.pdfPDF link annotation
    • http://protezas.lt/i/File/10418647821.pdfIn PDF document text
    • http://ozdoby-betonowe21.pl/Upload/file/gofis.pdfIn PDF document text
    • http://rooptex.com/uploads/surukadesotowadekovapa.pdfIn PDF document text
    • https://printjet.pl/pliki_user/File/vosutose.pdfIn PDF document text
    • https://umiyawoodworks.com/fckdb/userfiles/file/68439105591.pdfIn PDF document text
    • https://mcdelandes.ca/uploads/file/panarodofatakez.pdfIn PDF document text
    • http://www.derbysignandgraphics.com/uploads/file/11822229329.pdfIn PDF document text
    • https://ckeditor.pamlskovnik.cz/ckfinder/userfiles/files/wosalufuduwotox.pdfIn PDF document text
    • http://agavietnam.com/img/files/kesidavonoxamufito.pdfIn PDF document text
    • http://emaaravm.net/upload/files/jipakelujomonamadomonewop.pdfIn PDF document text
    • http://ecohort.com/userfiles/files/burefumojuwexaguxexupen.pdfIn PDF document text
    • http://caythuocnam.org/images/files/jevofogizo.pdfIn PDF document text
    • http://zehanbiopharma.com/upload/files/japoxorixosejunulos.pdfIn PDF document text
    • https://datxeninhbinh.com/data/dulieu/files/nemodetogugufojaz.pdfIn PDF document text
    • https://endobible.com/userfiles/file/39330300107.pdfIn PDF document text
    • https://bkairconditioner.cloud4demo.com/uploads/files/34651555969.pdfIn PDF document text
    • https://ayurmitra.com/files/file/32064765086.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613f7960bd5ad---ziwaxe.pdfIn PDF document text
    • http://architettipassarinmarzotto.com/userfiles/files/74273845054.pdfIn PDF document text
    • https://larustt.com/upload/ckfinder/files/8464969909.pdfIn PDF document text
    • http://markjfox.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/4012886510.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD354 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eb66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB66 23624 bytes
SHA-256: 976d21bef88e5b261bf4a11886b981f2bdcfd574dc915ea7cefd8e23a5519a7c
font_02_sfnt_off00012677.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12677 10852 bytes
SHA-256: 355e12fe1eff4aff972150c42f0d78398ab3caf58c87dd9082e82a63464ab79c