Malicious PDF — malware analysis report

Static analysis result for SHA-256 b766ab52619988f5…

MALICIOUS

PDF

83.6 KB Created: 2021-05-21 15:42:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a7801b13c94c5dd2c1e41b58f07d3842 SHA-1: eaaac1e695a62471a22d7f6271846c8d8b93b268 SHA-256: b766ab52619988f5a29f4c07581fa144c84aa1c5360afcbfd0aabccad6993d92
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains and Weebly-hosted files, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or distributing malware. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://resalured.ru/strik?utm_term=best+gallery+app+for+android+2018 PDF link annotation
    • https://panebafizi.weebly.com/uploads/1/3/4/3/134365464/kibapoxeg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485014/normal_60222efa72ef0.pdfIn PDF document text
    • https://duxuremi.weebly.com/uploads/1/3/4/6/134623812/xujebubam_biporegem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470683/normal_6048d542f1d97.pdfIn PDF document text
    • https://badexakabenal.weebly.com/uploads/1/3/4/0/134017850/87cf7eb.pdfIn PDF document text
    • https://jejegufixi.weebly.com/uploads/1/3/2/7/132740716/lurudubukog.pdfIn PDF document text
    • https://jumuvive.weebly.com/uploads/1/3/0/7/130776409/603d63999e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367297/normal_5ff7d4526f10a.pdfIn PDF document text
    • https://dofemavuxowag.weebly.com/uploads/1/3/0/7/130739836/6074108.pdfIn PDF document text
    • https://fexiganariv.weebly.com/uploads/1/3/0/7/130739648/dexiranepisixu.pdfIn PDF document text
    • https://fiwixenolo.weebly.com/uploads/1/3/4/4/134493020/xifiwi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367922/normal_6036fd29722e2.pdfIn PDF document text
    • https://mubuxepuvu.weebly.com/uploads/1/3/1/3/131383429/a94501e84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366050/normal_6039c6f9f1d43.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460247/normal_6000b2ec04bef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414487/normal_6061caaf9594c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374203/normal_60462133c2257.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/f4a58b81-7dcd-4805-b9e5-ba1c0dcb1c10/stand_on_zanzibar_brunner.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/faa03be5-9df2-43a9-8f14-c4eb16c08750/cant_remember_wd_my_cloud_password.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8078c011-9569-4a99-abbf-43da51940d50/brown_v_board_of_education_defendant.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6879b91-863e-4dff-9e7c-e5dd49963c25/how_to_show_data_labels_in_excel_2016.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4fb3011-3a25-412e-9659-50339621cead/dell_inspiron_3520_laptop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a6dc859-4cb3-41b9-ad10-4b395f07cc28/what_music_is_popular_in_south_korea.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2edca42-ca84-4721-b5cc-49c9ab3b525a/gapam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f6fae57-32da-446e-8b6b-3b2b53ef46c7/86307802176.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_off0001072c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1072C 5880 bytes
SHA-256: 888b1e9b80bfb97ac2deea389b0cc78feb10602fff17aac137b8289b8d5a2ba0
font_01_sfnt_off00011b52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B52 11024 bytes
SHA-256: f1924c63fe93abab884a948cc628512a4400c7e47088c67d8a760acab2b67cd0