Malicious PDF — malware analysis report

Static analysis result for SHA-256 fddff55ce6b2a333…

MALICIOUS

PDF

166.8 KB Created: 2021-03-11 07:41:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: aaa2f324f94f22e510173fe149e1139e SHA-1: 48f7db0455cbd1db7665407bbd09eba3c0c8d420 SHA-256: fddff55ce6b2a333a34e8359addd28096414574257f8f4e639c6e6a18268820d
184 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains numerous embedded links, with at least one pointing to a known malicious redirector at 'dafemum.ru'. The document body, though heavily obfuscated, suggests a lure related to 'In the palm of his hand kjv', likely a pretext to encourage link clicks. The presence of multiple disposable domain links further supports a phishing or malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/wix?keyword=in+the+palm+of+his+hand+kjv In PDF document text
    • https://cdn.sqhk.co/senuziker/hjggYie/ocoee_florida_map.pdfIn PDF document text
    • http://zaxevef.getenjoyment.net/zaloganirinenivebanarow.pdfIn PDF document text
    • http://tixesikixux.mygamesonline.org/can_google_identify_an_image.pdfIn PDF document text
    • https://cdn.sqhk.co/rewakevutel/uhdgixr/49979600033.pdfIn PDF document text
    • https://cdn.sqhk.co/safimowexaw/Yhahhhi/mermaid_secret_35_princess_ocean_war.pdfIn PDF document text
    • https://cdn.sqhk.co/kovezozeseg/Shcujfc/46770415116.pdfIn PDF document text
    • https://cdn.sqhk.co/tesikotuk/RHiaxkB/cracked_steam_files.pdfIn PDF document text
    • https://cdn.sqhk.co/tawibonikigo/CmjhrE3/daxeruranedaladajirikoz.pdfIn PDF document text
    • https://cdn.sqhk.co/sexasegavon/jaienJ4/musica_para_bailar_ballet_movidas_mix_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/tafolaku/nNhjUjc/legends_of_heropolis_offline_mod_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://01477de9-116b-42a6-a62c-54244336611e.filesusr.com/ugd/dea9e9_af12d51a5b6a4057bd0da40702449bf4.pdf?index=trueIn PDF document text
    • https://6e229dea-1f83-4be8-8cd3-388eabd4f5e3.filesusr.com/ugd/1cfe37_85ec6f7e5aba4462954c9f78a2b3c95a.pdf?index=trueIn PDF document text
    • https://c4a5d104-04f9-44e6-b03f-1f5edac3680f.filesusr.com/ugd/f23921_71a1ab8f19484224bfee54587d0b80cc.pdf?index=trueIn PDF document text
    • https://c6f55193-7475-4343-97dd-33cb3b141b6a.filesusr.com/ugd/808d8c_bbe1c2624bf34cf5ae0cfdd6770b8253.pdf?index=trueIn PDF document text
    • http://fovawipemezipu.myartsonline.com/how_much_is_a_2020_ford_mustang_convertible.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59b50884-abe1-4abe-a005-7151d061f906/pubononaxusopejimuwozogez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f3552ed-dbb2-4788-8dcb-00718116cbc5/75538034533.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/315376b1-6162-4834-bbb4-603b54f81964/how_to_write_a_simple_book_review.pdfIn PDF document text
    • https://460eb545-5389-4aa9-9e78-d1074a8bca0c.filesusr.com/ugd/21a131_edbdde6c89bd4043b77a0b88e3b007ed.pdf?index=trueIn PDF document text
    • https://be9ca920-c372-4566-b00d-544f92814f3b.filesusr.com/ugd/f0c5a9_4c09a044111b40ce930b15d43837601d.pdf?index=trueIn PDF document text
    • https://438e95ed-c264-4db5-88d3-1a9ca8b91b86.filesusr.com/ugd/733c1f_39448f962eee4bb1809680f2914d6626.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/17689440-51c3-4aef-afaa-ccea1f8b8db7/how_to_register_my_fossil_watch_online.pdfIn PDF document text
    • https://39dd5e1d-a581-41ec-a80f-9e19245c660f.filesusr.com/ugd/c2656d_6ebd65cd391f4282b4d470cb82f8f145.pdf?index=trueIn PDF document text
    • https://d7ae471b-a447-437d-81b4-4e603f8679d9.filesusr.com/ugd/0a3240_c9b4030996914413b493cddca6cb1c35.pdf?index=trueIn 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_off0002476a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2476A 5320 bytes
SHA-256: 7448153df941394a4ea2b7211a89e9366a3425017afb4ea16577c244fb7935a4
font_01_sfnt_off00025971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25971 17028 bytes
SHA-256: 0a82ea72b0e1defcf8fa553ba229fb8b5823d1fc32f5cbdaf1629f12b3499d5a