Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9d26adb8a75d35b…

MALICIOUS

PDF

88.7 KB Created: 2021-03-11 01:56:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: af71b7f88c1e5da78d835f634c9c063e SHA-1: f47724ebf04cff04f6c6d410386cb97ab9875d6b SHA-256: c9d26adb8a75d35bb75826cb89d1a874a650671ff86d5bbd9351191fd0ef332a
194 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and link farm heuristics point towards a malicious workflow, possibly involving embedded JavaScript to facilitate the download of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://druttle.ru/wix?keyword=student+exploration+circuits+builder+answer+key PDF link annotation
    • http://didazema.mypressonline.com/software_development_manager_salary_seattle.pdfIn PDF document text
    • https://zadobixif.weebly.com/uploads/1/3/1/4/131437920/5796804.pdfIn PDF document text
    • https://gitazedekof.weebly.com/uploads/1/3/1/3/131398323/29a539d.pdfIn PDF document text
    • https://cdn.sqhk.co/kuderoxuz/dpjjk50/88372485770.pdfIn PDF document text
    • https://kefavobora.weebly.com/uploads/1/3/6/0/136010588/bupetil-masafiwo-vebasiparexed-zilanu.pdfIn PDF document text
    • https://cdn.sqhk.co/fewoxenovof/hicjcij/lerijadibag.pdfIn PDF document text
    • http://betizekaxu.getenjoyment.net/how_to_make_cool_science_projects.pdfIn PDF document text
    • https://gosesubamumu.weebly.com/uploads/1/3/5/3/135348433/1384434.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://b4140449-9b96-4148-8619-c9b3eed7b48c.filesusr.com/ugd/c33cdb_18cb921acb0b4b90a493d03608aa6ab7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c39b99b-2550-4c5c-ace9-484cf3011b23/magnum_inverter_remote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/787e9ed7-bbfe-4528-8d7e-4fb287db0a56/rules_of_multiplication_and_division_radical_expressions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fad6440f-3f04-4722-87e9-2f7b23dc05e9/20617155713.pdfIn PDF document text
    • https://f4b9ed98-44c1-44e6-9966-d9817cd43de7.filesusr.com/ugd/9ced5d_7e049a7271974fd1ae0a60e690c36a19.pdf?index=trueIn PDF document text
    • http://gajopule.myartsonline.com/93729242978.pdfIn PDF document text
    • https://1347de4c-4e54-429a-b84c-372e60bc5a2b.filesusr.com/ugd/6c98bc_93b16b1deaf54fcca52e050351cb38c5.pdf?index=trueIn PDF document text
    • https://cb73dddc-8872-4e99-b939-d6a5e822a65b.filesusr.com/ugd/c34eac_c6ce30b8234946cb93f2e721eb5ef1cf.pdf?index=trueIn PDF document text
    • http://xekazaz.myartsonline.com/garmin_uhd_94sv_setup.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010f8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F8E 5516 bytes
SHA-256: f3add7d3d5221995adc85a25b222a79dd77f21534ab7430453529fc92aeec461
font_01_sfnt_off00012264.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12264 10852 bytes
SHA-256: 438dbcd1c09c13531086552a74595d9f9d7f5f359c7138cd000ae47c67c1d766
font_02_sfnt_off00014763.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14763 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333