Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2f29844630bd09a…

MALICIOUS

PDF

84.7 KB Created: 2021-06-11 10:27:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 3fa894bf3912481ca2d435807214d048 SHA-1: 0a41fe4b2f63d2b0c0f4a672c0a4a18bceba9e6b SHA-256: b2f29844630bd09a45b2e01462810d228280b0fc7295b3a0ef9ae1e4657d658b
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing campaign. The document body, though heavily obfuscated, contains references to popular media like 'Sword Art Online' to lure victims. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to redirect users to malicious sites for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://nomylo.ru/pbw?utm_term=sword+art+online+season+2+episode+25 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4409118/normal_60c066cf7df16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477156/normal_606798352bbd7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381978/normal_6042d0107eff9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383704/normal_5fe0a1349d0ce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381105/normal_5fe404777a893.pdfIn PDF document text
    • https://letotanuvimipe.weebly.com/uploads/1/3/4/5/134598603/dakupijaralot.pdfIn PDF document text
    • https://kivijakesav.weebly.com/uploads/1/3/2/7/132740669/sezurejofodep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469351/normal_5fe9067901215.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475564/normal_5fd63de6a6117.pdfIn PDF document text
    • https://jogelobob.weebly.com/uploads/1/3/5/9/135961552/ac2a492f20744.pdfIn PDF document text
    • https://zenimuxen.weebly.com/uploads/1/3/4/3/134317926/bozaratux.pdfIn PDF document text
    • https://xobijetulotifo.weebly.com/uploads/1/3/4/2/134234675/vefozemozitofidame.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4420028/normal_60afed91d5253.pdfIn PDF document text
    • https://bedupopepexetid.weebly.com/uploads/1/3/7/5/137514545/7e4ce67701.pdfIn PDF document text
    • https://sanufelileme.weebly.com/uploads/1/3/0/7/130775971/96b3ce8c5a98b1e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9eb0324f-6a01-41c7-b271-4d5b9055ae81/nogezuvigevifeket.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77e54627-a77e-43d9-a3d6-6f1e159aeb3c/girl_interrupted_movie_plot_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/739af0bd-adf2-49b3-a8ee-437ba8c81c80/monexusu.pdfIn PDF document text
    • http://dejimebez.pbworks.com/f/twilight_breaking_dawn_part_2_full_movie_free_download_mp4.pdfIn PDF document text
    • http://pamotekegopa.pbworks.com/f/11_minutos_paulo_coelho_descargar_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bed4fd5-4dcc-4833-a8e3-a859945dbd1b/politics_of_representation_stuart_hall.pdfIn PDF document text
    • http://kalunagepigi.pbworks.com/w/file/fetch/144770175/nizufaxowezinikokuriremi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/991f983c-e9a4-418a-952d-0a68c795d02d/23750922987.pdfIn PDF document text
    • http://dumogaluz.pbworks.com/w/file/fetch/144575037/how_to_play_one_block_skyblock_1.16.5.pdfIn PDF document text
    • http://xovelezid.pbworks.com/f/hill_climb_racing_mod_fuel.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fde9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE9 3896 bytes
SHA-256: a0ccfa7e3d9db0e66ff035ae4ab13f5710b0d685d5277391b979d19ee697d572
font_01_sfnt_off00010bb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BB7 5404 bytes
SHA-256: 3150c9f7206f0f4b4fca4625cd3d1d7b007d12a81a3ede953506ab6072be62d6
font_02_sfnt_off00011e37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E37 10584 bytes
SHA-256: b5e764d1eaa12ce39bfd78b9698883713aaa19e7a901ff7eadb61a16b372c540

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