Malicious PDF — malware analysis report

Static analysis result for SHA-256 f13dd522cca43c8b…

MALICIOUS

PDF

79.6 KB Created: 2021-03-16 19:22:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 685dc47f67d1098a4711834e4ef30c21 SHA-1: 711b2018932785174b3749afbaccef084b72ad69 SHA-256: f13dd522cca43c8b92ac7228a81f53c3b6027ef8af5c837c172a69664079779d
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm or phishing lure. The presence of external URIs and the overall structure indicate an attempt to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/wix?keyword=liga+cesar+chavez+santa+rosa+ca+2019 PDF link annotation
    • https://gefobivuvevu.weebly.com/uploads/1/3/1/3/131380717/6240291.pdfIn PDF document text
    • https://s3.amazonaws.com/lowuwofuxali/aspire_breeze_2_owners_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/pemoxeriko/bnieXge/36441514144.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374536/normal_5ff27cd9dac19.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412568/normal_5ff81311474ff.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/avast_antivirus_free_registration_key.pdfIn PDF document text
    • https://renugukid.weebly.com/uploads/1/3/0/9/130969315/a781682674c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500895/normal_6002ed8bf0dad.pdfIn PDF document text
    • https://cdn.sqhk.co/tatidukigag/wiarMhi/verizon_visa_card_customer_service.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/medieval_2_total_war_unit_models_folder.pdfIn PDF document text
    • https://vekatugid.weebly.com/uploads/1/3/4/5/134592715/bejufitotapofanatidu.pdfIn PDF document text
    • https://cdn.sqhk.co/mutexeze/dJidgfF/jamuzezesejerodatof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494160/normal_604057b262385.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463791/normal_6047b33a93955.pdfIn PDF document text
    • https://cdn.sqhk.co/kujotukil/LhfEXjf/wugalasupobodojeg.pdfIn PDF document text
    • https://bujozimadepaxed.weebly.com/uploads/1/3/4/6/134615651/691829.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/ratujusuwabakokilunejen.pdfIn PDF document text
    • https://cdn.sqhk.co/wanolugago/fhhx32m/57987456377.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/1a5ae656-5e9b-4123-8716-b9de87f52d56/explode_the_code_placement_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/969c5ef3-77f4-40f6-8326-ee77ed0182f0/50108992598.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1aab3c77-d203-4b89-b5f8-725b54321057/diniropujomaxifijade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1939da6d-6491-4005-83b6-0958c433feb6/el_principito_fragmento_rosa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d518c082-3e70-4128-a56b-fe7f2e833964/small_appliance_repair_shops_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d499188e-1c65-4040-a38e-1d2f7c649d02/how_old_is_percy_jackson_in_book_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/083e5322-3684-4296-8eed-c54be2140af7/drz400_engine_rebuild_kit.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_off0000f634.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF634 5564 bytes
SHA-256: 142a3680f0986ddbaffa0f5e18ae947038052f5a949dda0f90476c604dfd1143
font_01_sfnt_off00010935.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10935 11256 bytes
SHA-256: 320e0908e4e1a2ab12b7f5329981307d0e951d5d35e4aba6cebc02afe25a2aa3