Malicious PDF — malware analysis report

Static analysis result for SHA-256 56e5c178d5a08529…

MALICIOUS

PDF

79.8 KB Created: 2021-04-25 03:12:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e41d3e61121752b719e0682064a944f3 SHA-1: b1397f009628614a4a15cc3e226f44a92a4d2c5d SHA-256: 56e5c178d5a08529760a303f91564f3de55fe62beaed4e843f6e860eb4188ff1
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 0.9957

Heuristics 5

  • 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 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://xajibur.ru/strik?utm_term=joseph+prince+communion+book+pdf PDF link annotation
    • https://cdn.sqhk.co/soxuvezosapa/gdrGgie/gps_maps_and_navigation_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/vizebika/4jhjhfJ/mowegarazajobuvir.pdfIn PDF document text
    • http://tukomibewi.getenjoyment.net/ecological_model_of_human_development.pdfIn PDF document text
    • http://xelasurugopu.mywebcommunity.org/masagedebipabefumisufanu.pdfIn PDF document text
    • http://vixinusagodax.scienceontheweb.net/ralulakuzozumopebageza.pdfIn PDF document text
    • http://jofifuneku.medianewsonline.com/difawa.pdfIn PDF document text
    • http://mevixonur.mywebcommunity.org/tratamiento_nutricional_para_alzheimer.pdfIn PDF document text
    • http://rebibedo.mywebcommunity.org/termodinamica_subrata_bhattacharjee.pdfIn PDF document text
    • http://wugegifa.getenjoyment.net/1000_vocabulary_words_with_urdu_meaning_and_sentence.pdfIn PDF document text
    • https://cdn.sqhk.co/vapiwibisa/6hbiCgj/25839272760.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kavibajegis.onlinewebshop.net/how_much_is_an_ipod_mini_worth.pdfIn PDF document text
    • http://velelakolifuvu.onlinewebshop.net/gereruzimemo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/007633a9-c6ea-421b-a69c-668e38bbffdb/true_to_the_game_book_1_summary.pdfIn PDF document text
    • https://19972ee8-34f0-4900-8009-9f590161cd02.filesusr.com/ugd/64db51_3f632d207bfc4854a14f9dca46dafa30.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/bipominedukiwatufu.pdfIn PDF document text
    • http://gafodix.myartsonline.com/73878375612.pdfIn PDF document text
    • https://s3.amazonaws.com/gotitibekovi/57277267204.pdfIn PDF document text
    • https://s3.amazonaws.com/dutuzanob/wupawotuluniguzolexesola.pdfIn PDF document text
    • https://9dc8676a-0e58-44ee-a512-e339c7094702.filesusr.com/ugd/7c0652_2f22e3aedcaa49599797696d4238e7c9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/45d3d069-bbfa-4c75-8579-d3673f3ec25c/48358096338.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/bijwonen_formule_1_cafe_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d1f8757-5556-4ba0-a866-5e8acd7f7e0e/cradle_to_cradle_chapter_4_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2545ce70-e2fc-4d3d-95d4-0f6da1c440f7/34285478175.pdfIn PDF document text
    • https://7605d98d-8b17-4a41-9383-f5c8d5af9bcc.filesusr.com/ugd/2bed4c_d9ffe0c7cef94399942673a4fe1f7508.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vuraradaso/kopuvuvesulopatese.pdfIn PDF document text
    • https://f6180879-d31b-499c-8e42-fead7842c491.filesusr.com/ugd/007227_f3152fb8f4904c8797c14924f8a74b06.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f65b1f8-e885-43ee-b40d-b76ca253b2ea/58008864723.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fad7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD7 5348 bytes
SHA-256: 124af178f1ef17ddddbef2d0f87eecc78b6a2b222a2469bc2d7b448013c83366
font_01_sfnt_off00010cd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CD7 10608 bytes
SHA-256: 59dd880fa760b524bae5c3586e84665f649b3c49045e552a08a5fdaac7360a91