Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd47bb12276d2e9f…

MALICIOUS

PDF

102.5 KB Created: 2021-03-05 22:49:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b38049d128c1ab5004e21481a0caa82 SHA-1: df9504c1ced9b431e8b7070dce728b083bc4ede7 SHA-256: dd47bb12276d2e9f429eb7806e6c48abe261ed4bbe0f30e8612735d9ee66bdfb
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, with one pointing to a suspicious domain ('maypoin.ru') and another to a potentially malicious PDF ('wewofif.scienceontheweb.net'). The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, suggesting a tactic to manipulate search engine results or redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://maypoin.ru/wix?keyword=verdadera+historia+de+jesus+adrian+romero
    • http://wewofif.scienceontheweb.net/kejotetugubunipo.pdf
    • http://nusowutevu.getenjoyment.net/theatre_the_lively_art_10th_edition.pdf
    • http://zibukebolavor.22web.org/computer_hardware_store_los_angeles.pdf
    • http://femusawar.iblogger.org/what_does_bonne_annee_mean_in_french.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/1d55b8da-ce09-476c-ae75-7f8755ba65d2/bissell_big_green_professional_carpet_cleaner_machine_rental.pdf
    • https://uploads.strikinglycdn.com/files/446e45b3-4d2f-4d85-a7be-c7693cb17362/23115413578.pdf
    • https://9cfe8934-cc69-4f76-a0d0-2e9849ea4530.filesusr.com/ugd/fd9558_9c1eb1d4de7f4a2f99a4ef68152cb7a7.pdf?index=true
    • https://uploads.strikinglycdn.com/files/d82166ea-3aaa-4a5e-88be-952bfc1c7122/honda_eu2000i_inverter_generator_for_sale.pdf
    • http://kirogebi.epizy.com/acorns_stock_performance.pdf
    • https://uploads.strikinglycdn.com/files/2eb6530a-1446-4e9d-bccb-5af787fe94d7/xazodelutoxevupemu.pdf
    • https://uploads.strikinglycdn.com/files/85303532-8f06-4de1-88b1-b3ade5885e15/how_to_wear_feng_shui_obsidian_wealth_bracelet.pdf
    • https://uploads.strikinglycdn.com/files/59e96a1a-ba7b-46da-9038-d9743170bc94/zupafobozifojefogubitu.pdf
    • https://uploads.strikinglycdn.com/files/987ddce9-38a8-40d3-b900-ca25cd8d3fc8/what_does_the_tiger_symbolize_in_life_of_pi.pdf
    • https://0306adf0-382e-42f1-903d-71c3961c97f1.filesusr.com/ugd/7ff653_bcc207ff89114e8fb0e48f0be57fc047.pdf?index=true
    • https://uploads.strikinglycdn.com/files/2a06d163-0fd4-4e0d-bf02-5cbccdb6b066/what_are_the_11_sins.pdf
    • https://19f621d4-ab03-49b5-bf1d-c78de40104d4.filesusr.com/ugd/bc84a3_97e37c500eea441c89df88c03fb380bd.pdf?index=true
    • https://d17f4099-ecc1-42b1-9c73-51521793457c.filesusr.com/ugd/4a2613_57bf99e02f374e46a14075ab8b43a2dd.pdf?index=true
    • http://piwolimosopobu.myartsonline.com/linoleum_block_printing_lesson_plan_high_school.pdf
    • https://f8340159-69ce-4309-ac43-521e9a8475b4.filesusr.com/ugd/bc0b97_df67b347509449b5a1cb568bb41e5406.pdf?index=true
    • https://1094d5c0-a920-47c7-a1de-7e2d56a92d84.filesusr.com/ugd/47b1e8_0c20128a69a44c92a539c04fe7a966ce.pdf?index=true
    • https://uploads.strikinglycdn.com/files/41d04db6-4a0f-4311-84e8-eeda98caa7f4/python_set_add_all_elements_of_a_list.pdf
    • http://japuxotopoz.rf.gd/75540699999.pdf
    • https://c2bc7a71-cb21-434c-84f6-8d2fc09ed56d.filesusr.com/ugd/03ae60_04538cf4246f478e814440ae02c33b31.pdf?index=true
    • https://uploads.strikinglycdn.com/files/0b89220f-05e7-4f5e-aa42-8d349d98a4f4/noma_5hp_24_snowblower_parts.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001450f.bin
e181341c062bfec054834e4bd39324042258c8bf7b04cf44262821e158e06771		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1450F 4956 bytes
font_01_sfnt_off000155bc.bin
ca078483ffbd6bb00c56df9994266c23d332cb9e87b9a94dc32bf36888c853df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x155BC 11904 bytes
font_02_sfnt_off00017c10.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17C10 4324 bytes

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