Malicious PDF — malware analysis report

Static analysis result for SHA-256 cadca27e3be115a1…

MALICIOUS

PDF

79.8 KB Created: 2021-05-18 11:07:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 9c71651a69a3c48436072324f79649dc SHA-1: f8aa06caa2239c052f4d8432243dcfaec98ec2e7 SHA-256: cadca27e3be115a182fdd36a61757d721bf7e03bb4a5f018664e56a967455cdd
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users. The presence of a URL related to 'sony vegas pro intro templates free download' in the document body and heuristics like 'PDF_SEO_LINK_FARM' indicate a lure for potentially malicious content. While no scripts were directly extracted, the PDF structure and link farm behavior are indicative of malware distribution or phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/strik?utm_term=sony+vegas+pro+intro+templates+3d+free+download PDF link annotation
    • https://jilarikogezinuv.weebly.com/uploads/1/3/0/9/130969280/jogazi.pdfIn PDF document text
    • https://butafujedixixi.weebly.com/uploads/1/3/4/2/134236167/podofizogeronogalit.pdfIn PDF document text
    • https://xavebebojemap.weebly.com/uploads/1/3/4/8/134848852/7208322.pdfIn PDF document text
    • https://lesesagipamagaz.weebly.com/uploads/1/3/0/7/130739561/dalufa-xedanafuruwixix-rewuvezoratiwo-jezojiwudu.pdfIn PDF document text
    • https://vesevowix.weebly.com/uploads/1/3/3/9/133987154/efd96d72438d1.pdfIn PDF document text
    • https://sigesibum.weebly.com/uploads/1/3/1/4/131438142/xopujituwi-mofukojov.pdfIn PDF document text
    • https://pudorexejuvaw.weebly.com/uploads/1/3/1/4/131455832/6119066.pdfIn PDF document text
    • https://muxapikaw.weebly.com/uploads/1/3/5/3/135346573/logibekepojol.pdfIn PDF document text
    • https://mitapesazo.weebly.com/uploads/1/3/4/6/134652839/lexunakarut-kovute-suvidusipijovo-fepewawus.pdfIn PDF document text
    • https://fovojewonot.weebly.com/uploads/1/3/4/6/134669065/fabezofivi.pdfIn PDF document text
    • https://xanilavobug.weebly.com/uploads/1/3/5/9/135959945/diner.pdfIn PDF document text
    • https://mubuxepuvu.weebly.com/uploads/1/3/1/3/131383429/gegedavofabizurive.pdfIn PDF document text
    • https://xurebutira.weebly.com/uploads/1/3/2/6/132681359/xajibasofi.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/fd5e000c-1592-45dc-9c30-88c91f66a7c8/2000_suzuki_intruder_vs800_battery.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d22eaea-e51a-4eba-ba78-6d23d15d3823/55393656755.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8ffada0-818a-4a29-8fe3-422d9b42d186/what_are_the_4_stages_of_development_of_early_cultures.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66768c00-4434-4253-9c27-df703aa12060/vw_maintenance_plan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/371da18e-b75e-4e17-beba-8c5b375e9e03/how_to_obtain_funding_for_a_nonprofit_organization.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/082362b6-68ff-4945-a8e4-db6def1faf37/rinnai_1004f_error_code_11.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8cec1b1-4623-48ab-b5f6-4026a8689215/what_does_a_round_bale_of_straw_weigh.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_off0000f74f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF74F 5880 bytes
SHA-256: da971e51a0e4c0e7caefa15e8f1ccccd05f1e552cbf9e0caed21470d6f7e4879
font_01_sfnt_off00010b62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B62 10708 bytes
SHA-256: e5e540c0cfff3cc8d8ef37556cc5c850acb52a687775265d54d06ad8b8ccdeef