Malicious PDF — malware analysis report

Static analysis result for SHA-256 61e2976ef609ebee…

MALICIOUS

PDF

76.3 KB Created: 2021-03-24 08:12:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: b7ebc704d0ded7fedc966f6e1ffd911e SHA-1: 0e44cd6a97b9ba0cfde3a8ced492e26d8eb1afc1 SHA-256: 61e2976ef609ebee7545bca5d5461433d945feacde5d836dcfd92e5a69d23a26
186 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 high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The embedded URLs and the heuristic findings strongly suggest this document is part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://mezovuduw.ru/strik?utm_term=the+book+of+forbidden+knowledge+johnson+smith PDF link annotation
    • http://tokibekojavo.22web.org/contamination_of_surface_water.pdfIn PDF document text
    • http://toxipoxekej.medianewsonline.com/mckesson_employees_federal_credit_union_phone_number.pdfIn PDF document text
    • https://kolofajek.weebly.com/uploads/1/3/0/9/130969684/1118031.pdfIn PDF document text
    • http://passive-income.ru/235566205391sdqg.pdfIn PDF document text
    • http://titanof-filtr.ru/amantes_del_desierto_capitulo_310cunf.pdfIn PDF document text
    • http://slimitalia.space/manualidades_con_palitos_de_madera_paso_a_pasooejjy.pdfIn PDF document text
    • http://reactivaperu-viabcpi.com/66355596357zx99v.pdfIn PDF document text
    • https://zedazepofa.weebly.com/uploads/1/3/0/9/130969939/e4e4a0.pdfIn PDF document text
    • http://copyright-services-us.com/51624718597mbsoj.pdfIn PDF document text
    • http://tesugujinarijag.mywebcommunity.org/dekezodelunazovi.pdfIn PDF document text
    • https://ragibifurox.weebly.com/uploads/1/3/1/3/131379945/18aef6bce.pdfIn PDF document text
    • http://setopin.mypressonline.com/56944936710.pdfIn PDF document text
    • https://muxoramosuzuveg.weebly.com/uploads/1/3/4/2/134266249/denagexibuditoje.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0491f86b-060d-4f4a-be23-b0d01488777f.filesusr.com/ugd/faa7ef_3b981b80bbb6444a807a2478c213903a.pdf?index=trueIn PDF document text
    • http://feferabi.atwebpages.com/gre_online_test_prep_free.pdfIn PDF document text
    • https://3dcfbd4a-ef33-49dc-a04a-0aaf5307c30d.filesusr.com/ugd/b47706_ba1c52b45056428eb68ecb608cbb914f.pdf?index=trueIn PDF document text
    • https://55d63786-14d6-44de-84d0-33f1fb383c44.filesusr.com/ugd/45fd81_5aa0a592a61e4c6ca1a88a334b7f9868.pdf?index=trueIn PDF document text
    • http://rewogaki.rf.gd/muwiluga.pdfIn PDF document text
    • http://jaxeseludozoke.rf.gd/the_rime_of_the_ancient_mariner_and_kubla_khan_literary_analysis_poetic_sound_devices.pdfIn PDF document text
    • http://dudesugezapevi.rf.gd/bepugileka.pdfIn PDF document text
    • https://b6d28218-96ba-4f98-b9c1-0d78b4e6fe84.filesusr.com/ugd/47aa88_3e2f8c3a6b074a54a4ddd6802e3ac656.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFDB 5432 bytes
SHA-256: 46755004b553cf36d7e160120632c179242af9dc95384e450972ba77871b18aa
font_01_sfnt_off0000f244.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF244 2012 bytes
SHA-256: 6d89c54bfef412d02a439fa103b09c01255bf205ae670ca771b2ac50906b3e4d
font_02_sfnt_off0000fba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA4 11644 bytes
SHA-256: 34cf1ef3dfb49056bd9132122a01463a23ce71e631e8682a64258c4dc3e08179