Malicious PDF — malware analysis report

Static analysis result for SHA-256 06de993f1e5c3eb3…

MALICIOUS

PDF

98.6 KB Created: 2021-03-20 12:46:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: a3a093aae66778ef24496ac1bae6bb02 SHA-1: 00692d62fda351040f9ef9b298ee32f01d77c3c0 SHA-256: 06de993f1e5c3eb38258081e8b95d6b0154c9212374a7e7b3536979870dcafb3
126 Risk Score

Malware Insights

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

The PDF document contains embedded URLs that point to potentially malicious domains, as indicated by the PDF_SEO_DISPOSABLE_LINK_FARM heuristic and the ML_NYX_PDF_MALICIOUS and CLAMAV_DETECTION firings. The document body, though heavily obfuscated, suggests a lure related to carrying firearms, which is likely a pretext to drive users to the external URL. No scripts were extracted, but the presence of external links and the nature of the heuristics strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/strik?utm_term=best+way+to+carry+glock+43x PDF link annotation
    • https://cdn.sqhk.co/wazilisiko/1jgii6i/96219502883.pdfIn PDF document text
    • http://hayatevesigar.online/how_much_oil_does_a_mercruiser_5.0_takechjb8.pdfIn PDF document text
    • https://cdn.sqhk.co/lunapolakezo/heijlhb/nerd_vs_zombies_mod_apk.pdfIn PDF document text
    • http://trikotoria.ru/nobibor7jr1y.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476939/normal_60344f6f225b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457005/normal_5fdc169142167.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412773/normal_6031235c0a37b.pdfIn PDF document text
    • https://cdn.sqhk.co/joxipadij/xjhjeVG/electrical_wiring_diagram_for_new_house_in_tamilnadu.pdfIn PDF document text
    • http://yourdesk.website/481503000167uupq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475391/normal_604ca62d4f42c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424025/normal_5fd0491b74034.pdfIn PDF document text
    • https://cdn.sqhk.co/vakanaju/igHgefm/gry_online_my_dolphin_show_8.pdfIn PDF document text
    • https://cdn.sqhk.co/wewidipo/jchfihh/10295855379.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nemuwokatoram.epizy.com/44896804.pdfIn PDF document text
    • https://bd7a0a6f-bbfd-49cc-ba41-c3f2778102d9.filesusr.com/ugd/9ea91e_ddf5c0f15e1b4dc89f9ea64e92b8372c.pdf?index=trueIn PDF document text
    • https://56c41596-c8b3-4aa7-a075-23c9724d7f97.filesusr.com/ugd/ed77b2_49cf516daeb049d89ce887cac158e064.pdf?index=trueIn PDF document text
    • http://vigigizumobake.rf.gd/42098964992.pdfIn PDF document text
    • https://c84d532c-3b33-47d6-96aa-4134a1164eb1.filesusr.com/ugd/6d45f6_f1d8fecb991642b8851929e83ba54068.pdf?index=trueIn PDF document text
    • https://f33d1b56-f518-462b-b61f-c1b5c1ba661c.filesusr.com/ugd/1c44ce_2332d3157d0c4a5b9f7c4e4026e68cc8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/aba66c2f-c364-4f49-945c-3565eee7dd8f/vishnu_sahasranamam_lyrics_in_tamil_scribd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db4fb311-4eb4-4bec-9e29-5e2684fc00bd/how_to_tie_your_jump_rope.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1a2c7f8-9c3d-44f7-97c6-2bfbfb5b8f8c/why_is_my_printer_not_printing_black_canon.pdfIn PDF document text
    • https://aa6d2f86-95e2-42cc-897e-6bbd71c3a116.filesusr.com/ugd/78daac_30be32a21ac24a1b8d56000f3ab9dcf5.pdf?index=trueIn PDF document text
    • http://godakumezaguf.rf.gd/davanesigonavem.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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000161fd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x161FD 17696 bytes
SHA-256: e92d86f79d6e038e15d029c2a8436475527c017a90f8d3e1e2791cbe9c0b1346
font_00_sfnt_off00012328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12328 5596 bytes
SHA-256: 0b4186242fffdd55b9a42faebb33e93fce9a2640227a251e3016970af033f8b4
font_01_sfnt_off00013673.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13673 13112 bytes
SHA-256: 1ac5c5d7e161e38c5fbc73d0e942b81c5ad5a5f9093145942de9310fec704f47