Malicious PDF — malware analysis report

Static analysis result for SHA-256 5466137afbe75642…

MALICIOUS

PDF

81.5 KB Created: 2021-03-19 01:09:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 043827c9d95bf2340187b9d7c37da3c2 SHA-1: 998efe109a5c6db7c99a59aeca03808b1914a57d SHA-256: 5466137afbe75642963f85754de66def93149c0129b7800e803269424ef50284
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing attempt. The embedded URLs suggest an attempt to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://jacksth.ru/award?keyword=jupiter+the+bringer+of+jollity+pdf PDF link annotation
    • https://duwelivupegated.weebly.com/uploads/1/3/4/7/134711348/gixulinasimufil_vifiradujosu_soduxobowako_bevolokozif.pdfIn PDF document text
    • https://wixokaregojes.weebly.com/uploads/1/3/2/6/132681478/9979605.pdfIn PDF document text
    • https://mikovenib.weebly.com/uploads/1/3/0/8/130813447/nipiza.pdfIn PDF document text
    • https://jawoxufogor.weebly.com/uploads/1/3/6/0/136022219/kasometuxavazukeku.pdfIn PDF document text
    • https://ginuwedisifixel.weebly.com/uploads/1/3/4/7/134744372/gawusugefawezolup.pdfIn PDF document text
    • https://wugeneziwepuzi.weebly.com/uploads/1/3/4/4/134494794/67482a3de4b.pdfIn PDF document text
    • https://vawudida.weebly.com/uploads/1/3/4/8/134890241/4eeed085cf.pdfIn PDF document text
    • https://bovikobugekut.weebly.com/uploads/1/3/0/7/130775803/xudoperewo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/00334936-e1c7-46d2-8377-48c264312d37/73408623871.pdfIn PDF document text
    • https://aa0e52d0-3c12-4d86-bfd3-e3284f950a51.filesusr.com/ugd/eb1974_2664c0e6006447a390a9a9366f3d8d4c.pdf?index=trueIn PDF document text
    • https://f18b8dc1-3ce9-44bd-8712-01435d039869.filesusr.com/ugd/b97cba_3505cc9fcb2e483ab15b911aea2d89e8.pdf?index=trueIn PDF document text
    • https://54957a25-093b-4cbd-a4f0-8eb5fea931f0.filesusr.com/ugd/8ba634_e694883b475f4e059aab1b6c99119f88.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/12032af5-6d3a-4ecb-8853-287ac14d6367/engenius_ens202ext_range.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af761f5f-9e04-449a-8494-38e45d3db330/all_the_birds_in_the_sky.pdfIn PDF document text
    • https://298c7861-702e-4dad-8e6b-798164301c36.filesusr.com/ugd/98adb1_7a6e6d542b714c44b79a198ccb8aec04.pdf?index=trueIn PDF document text
    • https://44879a12-c10a-431c-a98a-7de142752d0f.filesusr.com/ugd/bb4607_ca78147d5cc8447ba389dcf71f2e71e7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4a22a8c-9888-410a-b923-dd2a87ca29fd/kiwoje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35642901-3555-4440-9361-95a96f2737c4/9066071463.pdfIn PDF document text
    • https://16fd3b15-5541-4454-9538-28daacbf497e.filesusr.com/ugd/e32576_01d1ca82905043bfae92b4710c098792.pdf?index=trueIn PDF document text
    • https://56a7be67-7dca-40da-a973-69ad719fb73b.filesusr.com/ugd/fedf23_ed5686fdadec4730abf14cd8e6a18f3f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/88135ce1-5bd4-435e-b107-e1436d539448/51024020051.pdfIn PDF document text
    • https://74df6fe0-557b-4e47-8461-f2df536053d0.filesusr.com/ugd/4dcf4e_7965823eb5414d4e8a769ac0e057a4e0.pdf?index=trueIn PDF document text
    • https://69c5641f-197a-42c1-bef1-daa502c1f1d7.filesusr.com/ugd/948cea_1426c6a678564f509875f0c31195dc1c.pdf?index=trueIn 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_off0000fb23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB23 5224 bytes
SHA-256: c38921afa3e6469eee6ef7bdd9779a7027830e98af2341188f3d4ad61d1ef044
font_01_sfnt_off00010cee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CEE 14212 bytes
SHA-256: 7eacca1b3fb9660c98a11c07538299bbe26442ad575d2904b9e93c8ea7c6d61f

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