Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d4d8704a1aa2bb0…

MALICIOUS

PDF

97.6 KB Created: 2021-03-08 11:39:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 6dda7c5dba8e99587cd534ffdc9251b9 SHA-1: 99e7d3ac44b5c600020801210de4ff2aac27d918 SHA-256: 1d4d8704a1aa2bb0dea3dd83a0089b233afe85f479cd3e11f67d3f749c2c4667
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to disposable domains and are likely part of a link farm or phishing campaign. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically related to phishing. The embedded URLs and the nature of the heuristics suggest the primary goal is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://kuzutuzo.ru/123?utm_term=android+setbackgrounddrawable+may+produce+nullpointerexception PDF link annotation
    • http://bigwin-1xbet.fun/zisodevokixolamalogor2crie.pdfIn PDF document text
    • https://wiwazojuxosupud.weebly.com/uploads/1/3/1/3/131379189/lixikowejefalonarek.pdfIn PDF document text
    • https://sunivisoxeban.weebly.com/uploads/1/3/4/4/134493344/2745903.pdfIn PDF document text
    • https://nisudine.weebly.com/uploads/1/3/1/4/131454656/razefovutedebeli.pdfIn PDF document text
    • https://vojufutevale.weebly.com/uploads/1/3/4/5/134521456/vebukosigen.pdfIn PDF document text
    • http://carbags.site/sedona_method_workbook4ti9q.pdfIn PDF document text
    • http://org-fruit.space/gunufadufepikikk8rmi.pdfIn PDF document text
    • https://rofujerejikuf.weebly.com/uploads/1/3/5/3/135388349/3257811.pdfIn PDF document text
    • https://kobetuditi.weebly.com/uploads/1/3/4/4/134446504/votojeloregu.pdfIn PDF document text
    • http://magazinrf.xyz/bodizetibozotaxavuzobumq45ql.pdfIn PDF document text
    • http://6gusevshop.website/section_138_of_negotiable_instrument_act_case_laws_in_hindi38mg6.pdfIn PDF document text
    • https://semizafug.weebly.com/uploads/1/3/1/8/131871859/5897688.pdfIn PDF document text
    • https://wikefazopikevi.weebly.com/uploads/1/3/4/7/134715570/lipesaxaborewif_gebabadit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://eed7fa7e-4f31-4ba6-8269-e73f07ac74c5.filesusr.com/ugd/93374d_d47e6a8951c34808a7787cf7c30c3b13.pdf?index=trueIn PDF document text
    • https://77047a80-9f17-4504-a563-a097c25ca12e.filesusr.com/ugd/5c8b2f_95f652bcff4342d080def6134b18caa7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2627612f-2360-42fa-b138-91811aadd9ea/la_biblia_catlica_hablada_en_espaol_completa.pdfIn PDF document text
    • https://33b7cf8b-1cb2-46d9-9063-17e97cba5e80.filesusr.com/ugd/9edd50_71068a694c314d77a0c38e9951f9876d.pdf?index=trueIn PDF document text
    • https://9df6fdd8-df71-43fb-87ad-b121b2de7416.filesusr.com/ugd/e0d0cf_00bdb60a38424db3b98bec6999d9ee40.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a190f8e4-bd5b-42d0-aab8-d72762308acb/magnetek_impulse_g_mini_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c2182fc-5d52-4b16-a554-19af59e4899c/data_communication_and_networking_mcqs_with_answers_download.pdfIn PDF document text
    • https://c0cead0d-5248-483d-940e-95cc3acd9bde.filesusr.com/ugd/20d83a_f382873621b342e892158d9b4b7e1b18.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/22d454c3-85a1-4a8b-9716-41ab23ae2296/best_weight_loss_chart_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e65743c9-e22c-4ab8-9a6f-fe9ccf8d3a06/kufekatafarulaxedogozexa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da5d7d13-083a-429b-9ebd-6f1156ecc067/fifty_shades_of_freed_movie_download_filmyzilla.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef31013d-4047-4ea1-b985-bdde075a14ac/74352663401.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0205564-c2ae-4316-879c-c872863d66a3/safatisowex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/101bb87b-2db7-44a4-8a47-cf5fe695dfcd/annabel_lee_poem_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ad24946-5ac6-4049-9d7e-221d335b9c8e/how_to_become_an_auto_mechanic.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://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_off0000f704.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF704 14136 bytes
SHA-256: d3076d67594aaadbf693641b38aca9f10eef6f1b4fffd16d2db981c51debe698
font_01_sfnt_off00012558.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12558 5848 bytes
SHA-256: 9aa6416ee0b65ebc278a5a01061b766402fdc9d9d8cbc6d4ad65d8483bfeb8c7
font_02_sfnt_off00013948.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13948 12004 bytes
SHA-256: 6b0bfa9e05b8d467f553a75687bd162cd8cb1188cb146d9d5484af78baaef6ff
font_03_sfnt_off000161fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x161FC 16088 bytes
SHA-256: 179678041edc4cdaae8c19736afc37a9524181cba276a02997144ab90296486b

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