Malicious PDF — malware analysis report

Static analysis result for SHA-256 57771a416b46d6bf…

MALICIOUS

PDF

68.1 KB Created: 2021-03-18 12:17:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 394067b67fd8d2d130e0dd7b42f62736 SHA-1: a8d42ad16decf71c16d90e0fa8515559f1aea341 SHA-256: 57771a416b46d6bf553b8272c3ce4b9cedc64b09a41751b5c8d7514e69a9690f
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ClamAV detection and ML classifier also indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a malicious document designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5247

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.
  • 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
  • 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://druttle.ru/award?keyword=calendar+ortodox+2020+pdf+download PDF link annotation
    • https://cdn.sqhk.co/fapiwejagiz/hdmuif8/boxhead_zombie_wars_unblocked_at_school.pdfIn PDF document text
    • https://lalibirubifo.weebly.com/uploads/1/3/0/8/130873838/d51a70850.pdfIn PDF document text
    • https://lodavoxi.weebly.com/uploads/1/3/4/5/134505118/lodigomefafira_vixibiko_zipar_muwajuga.pdfIn PDF document text
    • https://degewobajobazim.weebly.com/uploads/1/3/5/3/135324790/kazawikaw.pdfIn PDF document text
    • https://cdn.sqhk.co/modajili/P0WZEic/tovugezira.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/cancriformis_grn_spanien.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/higher_ground_stevie_wonder_sheet_music_free.pdfIn PDF document text
    • https://cdn.sqhk.co/damapegapi/gdKhftu/cytosine_always_pairs_with.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/rojomapewejitad.pdfIn PDF document text
    • https://tezilejesitox.weebly.com/uploads/1/3/1/1/131163634/031b0.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f20522fe-cea9-4675-851c-330685ed85c2/computer_systems_analyst_class.pdfIn PDF document text
    • https://b1d4f555-1eac-4d61-aa83-27206cf3ee4b.filesusr.com/ugd/1706f5_1d374190d579490f8d1fde895a179950.pdf?index=trueIn PDF document text
    • https://9534cc33-30dc-483d-bed2-8d5691710d48.filesusr.com/ugd/3835dd_1fc165d1349e47699068b7a7641893ac.pdf?index=trueIn PDF document text
    • https://457cefd1-268f-49c0-9ca4-ced5ac281e6b.filesusr.com/ugd/983758_5880331f60674ad69d49f1cb38627551.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cae1c59-a59b-4c6f-938e-d323706c26bd/how_to_reset_check_engine_light_on_chevy_malibu.pdfIn PDF document text
    • https://c3a7a64c-5591-430b-94d7-c2eadfdf3523.filesusr.com/ugd/966478_8d25ebcfe6f240988bf9513b0221fd9a.pdf?index=trueIn PDF document text
    • https://507d1b22-ea03-4061-a262-f79425337ca2.filesusr.com/ugd/a374b9_5beda73241574b6a865cba18c66de979.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f952c145-38db-4904-b09c-e9935d77feaa/91452041766.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a34b40f2-ae4e-4610-a66f-c4eb8f4f7bb1/34642635751.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ff3b52d-671e-4fea-98a2-5b10837b7288/4403232994.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e088fc1d-abe7-4e40-bbae-1be35d7c6e40/71559523767.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4ad1d8d-469f-481e-8a2b-fb1a85e2677f/bodyweight_workouts_for_legs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d142066-a43e-4ab6-b0c0-47dec0cc7147/55851857341.pdfIn PDF document text