Malicious PDF — malware analysis report

Static analysis result for SHA-256 4007d4197e5ce26b…

MALICIOUS

PDF

110.2 KB Created: 2021-05-22 09:51:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1c521ffcd596343f8a2ab67e15730e22 SHA-1: 931cda79a9459700a72728ad158134766f11bd02 SHA-256: 4007d4197e5ce26b98db01a3f7b08580a41bedccc65e50cf3dfb6f1aa76838f2
196 Risk Score

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. It uses a password-protected-archive lure. 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 0.9988

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://leonvi.ru/strik?utm_term=yo+kai+watch+2+fusion+item+passwords PDF link annotation
    • https://basedupapopulow.weebly.com/uploads/1/3/4/3/134344364/6ae9fda78c0fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452217/normal_606b2df27527e.pdfIn PDF document text
    • https://sopaxibifezubin.weebly.com/uploads/1/3/4/6/134608036/gesenafebixikuzimaka.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460686/normal_5feb0407a9ff3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366305/normal_5fdd48928d7e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367650/normal_603b7560f1a90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408709/normal_606c8f52a3ca0.pdfIn PDF document text
    • https://vuderuxedus.weebly.com/uploads/1/3/4/6/134692959/2fe8ab5b9a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388174/normal_606ade50edc87.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/ravuxudibure/how_much_does_an_oklahoma_drivers_license_cost.pdfIn PDF document text
    • https://s3.amazonaws.com/kegubinefuda/platform_bed_frame_metal_queen.pdfIn PDF document text
    • https://s3.amazonaws.com/dosipive/48597906961.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad6b4120-f691-4159-820b-2bbed4a174e9/lenovo_thinkpad_t420_drivers_for_windows_7_32_bit_download.pdfIn PDF document text
    • https://s3.amazonaws.com/lanaladu/mechanics_and_thermodynamics_of_propulsion_solutions_scribd.pdfIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/greene_county_ohio_sheriff_reports.pdfIn PDF document text
    • https://s3.amazonaws.com/zabevog/budesonide_formoterol_imss.pdfIn PDF document text
    • https://s3.amazonaws.com/fomudebipefasu/baby_bassinet_sheet_sets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03b6a2c1-fa7c-46a7-8431-cd751a696c63/how_to_feng_shui_your_dining_room.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/473868a2-189c-44d0-a8ad-66703e902dbd/what_numbers_are_considered_very_high_blood_pressure.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/acromial_angle_formed_by.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd772a68-1901-446f-89cb-6a78d02f35fb/xibifibetimu.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001328b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1328B 6328 bytes
SHA-256: 5b675596786dde6d1a6172be0c9e8d353eb63f5ba0c2a58c9062880623cb4abe
font_01_sfnt_off00014841.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14841 5492 bytes
SHA-256: a6764e4ce3c90ab6869640e36ed2a9c6eb1a840549a55016170cbe7af0471692
font_02_sfnt_off00015acc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15ACC 14188 bytes
SHA-256: c553d35059cbc1bd47d20daed5b7f93e7403336196c0c0d4dbf7a5f48cd6509f
font_03_sfnt_off0001875a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1875A 16132 bytes
SHA-256: 60f53b17f7925ac1818ac9336ea58fd206fea48872b5377b70e6fb8114080afd
font_04_sfnt_off00019c4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19C4D 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378