Malicious PDF — malware analysis report

Static analysis result for SHA-256 e175413d7da688b2…

MALICIOUS

PDF

71.9 KB Created: 2021-03-14 02:49:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3115344438d3c9bfe7ed13f208b1cbdc SHA-1: 5e82e5761581467a42cd3831282f0024f251fd09 SHA-256: e175413d7da688b2408bfde567c2d012dc41ce42104eee34545b3fa04c17340a
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9997

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 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.
  • 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://resalured.ru/award?keyword=2020+calendar+pdf+free+printable PDF link annotation
    • https://pinozawekik.weebly.com/uploads/1/3/4/5/134589254/8802854.pdfIn PDF document text
    • http://patedeziw.mypressonline.com/sukonupunop.pdfIn PDF document text
    • https://pusiruse.weebly.com/uploads/1/3/4/7/134717846/rinurodomusi.pdfIn PDF document text
    • https://bazubipevudupu.weebly.com/uploads/1/3/4/8/134876407/6727300.pdfIn PDF document text
    • https://jorojiwelipevo.weebly.com/uploads/1/3/5/3/135393556/b02ced13e4.pdfIn PDF document text
    • http://komaxinatobofe.medianewsonline.com/1981_honda_express_moped_value.pdfIn PDF document text
    • http://xelibirujegid.mywebcommunity.org/dewalt_dws780_instruction_manual.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d70b1dc8-7d09-4148-9854-e6a7cae1b87b.filesusr.com/ugd/5899d5_1619c48932b94360ab4acb18ac294bd3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/raymarine_c80_radar_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/tupofelasujewas/caballo_lake_new_mexico_fishing_report.pdfIn PDF document text
    • http://wulibazosuxib.onlinewebshop.net/asus_m5a97_le_r2.0_motherboard_drivers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42ab1a00-4799-4878-951c-874ba5b2fec7/losewuvos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84a714f8-c630-40aa-b518-59ab5257c991/tp-link_tl-wa850re_300mbps_wifi_range_extender.pdfIn PDF document text
    • https://923a8ca3-316b-4844-b38f-9bc955ad4852.filesusr.com/ugd/312e0e_4448cc666c0b4369b991f0ff908350a7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fasudikek/distance_time_graph_worksheet_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/best_online_piano_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d0cba98-8409-4026-93e5-2155ad28f7e9/dd_wizard_spell_cards.pdfIn PDF document text
    • https://720c7b34-a033-4bf0-83ea-6be17de98aa2.filesusr.com/ugd/03ef8e_9e3f187bab0d401caf646556b93b9be4.pdf?index=trueIn PDF document text
    • https://6e37e838-c278-4d46-baa9-25b8497af200.filesusr.com/ugd/fbcb80_e7774ac5b9b8463d9a8b18b01e3a0d8b.pdf?index=trueIn PDF document text
    • https://926da24b-d3df-4aea-ac1b-ebdf7359a9e7.filesusr.com/ugd/fef925_092d3a25029f4802ac95abdbbe841e4a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/lovujogenilenake.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_off0000dc7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC7C 5288 bytes
SHA-256: f81dbd3ebf48d63ae5bfaac634ea966eae8af85b604e98321477a11caf12ce62
font_01_sfnt_off0000ee7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE7A 10516 bytes
SHA-256: 8f4a89f023411f80823abd22461a02fc0076b97ece9b9b4621fbf51708802e54

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