Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c1b46d1a2657354…

MALICIOUS

PDF

102.1 KB Created: 2021-03-21 04:32:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e38314798b9aab03a8ad014e74585b83 SHA-1: 16caff3fe5d91df659f66f8cf79ebd21f490a544 SHA-256: 2c1b46d1a2657354035e1745b9205a00ee14922ca9364ef624104ab09879eef0
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://nipisod.ru/award?keyword=desh+patrika+pujabarshiki+2020+pdf PDF link annotation
    • http://menbp.online/iphone_5c_price_in_nigeria_slotq7ww3.pdfIn PDF document text
    • https://cdn.sqhk.co/silagigud/g6RMJGq/pevonutune.pdfIn PDF document text
    • http://bestcreditcheck.info/selifetzuv8.pdfIn PDF document text
    • http://tusiteguluvora.getenjoyment.net/80605749093.pdfIn PDF document text
    • https://cdn.sqhk.co/korebuxaguz/75idss8/webetiwijo.pdfIn PDF document text
    • https://cdn.sqhk.co/xugumewaz/drihgjy/fetajij.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371010/normal_5ff810d9b8b27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461791/normal_6041ead6ee7e2.pdfIn PDF document text
    • https://cdn.sqhk.co/segidexu/eXjfPjB/rigubejipudasefiba.pdfIn PDF document text
    • http://sputnews.com/lubijipowilusobamedignscai.pdfIn PDF document text
    • http://theboldpantsproject.com/mobijigalivogo2qca6.pdfIn PDF document text
    • http://lozhobelir.space/nabevulipidulijewotd2a4.pdfIn PDF document text
    • https://cdn.sqhk.co/difigobon/iazhubk/voice_lessons_near_me_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450138/normal_6018c52593e53.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cff07a16-13b2-455b-8a78-148a75b158b4.filesusr.com/ugd/cda0c7_d14528bd8edf4e1ea89eaa0969ee958c.pdf?index=trueIn PDF document text
    • https://c504e2ef-f928-4e80-b5b1-fc05046f432e.filesusr.com/ugd/247f25_f411841dafed435693b1b1217eb66d13.pdf?index=trueIn PDF document text
    • http://wolobugoxew.myartsonline.com/anemia_aplasica.pdfIn PDF document text
    • https://s3.amazonaws.com/kesumasaka/bamixupemuzidirubap.pdfIn PDF document text
    • https://s3.amazonaws.com/zifilobesumafi/bhoothnath_return_movie_300mb.pdfIn PDF document text
    • https://97a45c9e-1ab5-462a-bfe2-fded34b9a8b9.filesusr.com/ugd/b50c55_e6b0f536e82443b69b7ae5c43e9d71d2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/can_i_do_istikhara_in_periods.pdfIn PDF document text
    • https://203e7bc3-08d7-4ecc-a8df-f797e0d4a079.filesusr.com/ugd/d4579c_0fb37b4106e543828ab093a48466e12e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xezonijida/algorithms_robert_sedgewick_and_kevin_wayne.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/topeperebovuxaxarebusas.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000114d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114D7 5652 bytes
SHA-256: 9c9ee69466fba282d82e5af94488a8008ed17a331b3ee23374d8aba708c1b5ff
font_01_sfnt_off00012806.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12806 11064 bytes
SHA-256: 74764405f8a5ff0c881f59233ad891c36896158891a87090d52abe49165066db
font_02_sfnt_off00014c27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C27 11900 bytes
SHA-256: 5bacab4e50d5009cbe843239b912067e2035ea803f61500be158818cc27981fa
font_03_sfnt_off000174f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x174F6 16164 bytes
SHA-256: c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e