Malicious PDF — malware analysis report

Static analysis result for SHA-256 30c26aa46e852388…

MALICIOUS

PDF

79.4 KB Created: 2021-03-31 12:21:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: b54143b657abcc230d9d0251d6937644 SHA-1: 2f81af6cff4d1a5e2c069dd8fdf5c47b47693151 SHA-256: 30c26aa46e852388d5f8c4a4ddda8b931059f5605d6ef06fe72611136f568d05
186 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many pointing to disposable hosting, and is flagged by ClamAV as a phishing trojan. The document body, though heavily obfuscated, references a 'Kenwood kdc-bt562u firmware update', suggesting a lure to trick users into visiting malicious sites. The presence of embedded URLs and the link farm heuristic indicate an attempt to distribute malicious content or redirect users to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://zajinet.ru/strik?utm_term=kenwood+kdc-bt562u+firmware+update PDF link annotation
    • https://boxuxalido.weebly.com/uploads/1/3/0/8/130814411/7586551.pdfIn PDF document text
    • https://favigogijow.weebly.com/uploads/1/3/4/6/134643924/parim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365639/normal_601b7525b3559.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380084/normal_6014247ae9e3d.pdfIn PDF document text
    • https://mozeduxazos.weebly.com/uploads/1/3/4/0/134018133/f74f1d056b14ee3.pdfIn PDF document text
    • https://rakazukubuzabi.weebly.com/uploads/1/3/4/7/134736781/15319839.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376374/normal_5ff17ee1cbc6b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425227/normal_5fcb5750c4145.pdfIn PDF document text
    • http://vemonubamupol.iblogger.org/how_to_edit_paint.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/59f69e6f-b7f2-4f72-96ae-a2716893af01/tavelimu.pdfIn PDF document text
    • http://karajifaderiwow.epizy.com/area_of_triangle_formed_by_coordinate_axes.pdfIn PDF document text
    • https://4c2674ec-1430-4cec-a455-d6a35d10586e.filesusr.com/ugd/38955b_5c42771b6ef34d7c9c97453e3b0fd8be.pdf?index=trueIn PDF document text
    • http://wekazuvenasiwuf.epizy.com/approval_request_letter_template.pdfIn PDF document text
    • https://38aad9b5-7a72-45b8-ac81-9fe73ce82000.filesusr.com/ugd/08338c_41de310139894edf89f30005e91a8964.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fde3d946-499d-40dc-baf3-8491595daf35/71384787930.pdfIn PDF document text
    • https://882e4f53-a7e1-4d4a-89e8-a6e6d9f9b805.filesusr.com/ugd/9a13d2_249cfab5df9144b6922c509ed09bdbdd.pdf?index=trueIn PDF document text
    • http://dixitexajujus.epizy.com/4723540733.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95d34b77-1120-43ab-a3bb-4f42b06ce708/is_fitbit_charge_3_really_waterproof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08a2b024-1ce3-4238-beda-42d88169ba07/how_to_change_date_on_citizen_eco_drive_perpetual_calendar.pdfIn PDF document text
    • https://71a0d42b-91d5-4e94-9338-ff69ca8a624b.filesusr.com/ugd/e5d5e5_302f880b82054f5cb6a95c1490e29d41.pdf?index=trueIn PDF document text
    • https://b1c30c75-ab46-439a-884d-3836ae4b8a49.filesusr.com/ugd/2d1648_74beb4bf91044bde90501548cbcdc8f2.pdf?index=trueIn PDF document text
    • http://zitebexelopor.rf.gd/sap_abap_interview_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f00a8e7-ceb7-436b-bebb-bf41a2c9b249/firefox_45_esr_mac.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_off0000f5b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B1 5800 bytes
SHA-256: a56ea014d0124a31f60b06112e93aec77c5ccc73aa010aa0eaf59aeb9e03496a
font_01_sfnt_off0001097c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1097C 12452 bytes
SHA-256: 53c767a21051d71e6fd33f2be9b228aa19ffeb66492b5501e594667ca0befaba

Open this report in the interactive analyzer, or submit your own file for analysis.