Malicious PDF — malware analysis report

Static analysis result for SHA-256 1771d5c3f789820d…

MALICIOUS

PDF

76.4 KB Created: 2021-03-08 20:43:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 05d1209e0db4c712d36a0f31ce2c4c86 SHA-1: 4e1540a5e764a908700121463c298507570fd296 SHA-256: 1771d5c3f789820d3989c453c2551e92f1a62f74246e2e157f45c1d34248ecee
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a high heuristic indicating it functions as a link farm on disposable hosting. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://ponafet.ru/wix?keyword=vera+wang+bedding PDF link annotation
    • https://cdn.sqhk.co/kurinunuwor/hxhdZja/25222890409.pdfIn PDF document text
    • https://kujibolivobukib.weebly.com/uploads/1/3/1/1/131163991/4593968.pdfIn PDF document text
    • http://jelebojibujij.iblogger.org/billionaire_lyrics_bruno_mars.pdfIn PDF document text
    • http://kutatit.getenjoyment.net/37862128307.pdfIn PDF document text
    • http://vowufijetapiko.sportsontheweb.net/the_leap_by_louise_erdrich_conflict.pdfIn PDF document text
    • http://guwunewuwujulat.iblogger.org/messenger_lite_old_version_apk4fun.pdfIn PDF document text
    • https://cdn.sqhk.co/tobijoge/liaigii/react_beautiful_drag_and_drop_example.pdfIn PDF document text
    • https://gekafokolasiga.weebly.com/uploads/1/3/1/3/131384301/josezeseviti.pdfIn PDF document text
    • http://todegapevaja.iblogger.org/background_business_card.pdfIn PDF document text
    • https://cdn.sqhk.co/sobetevod/hihijid/vumere.pdfIn PDF document text
    • https://cdn.sqhk.co/duponetix/ZUjjid6/best_paid_offline_english_dictionary_app_for_android.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://e0ff2378-281a-4ea3-95ae-419c526fdc99.filesusr.com/ugd/0baf77_ad31a090e314419b901e475ccf3ab69d.pdf?index=trueIn PDF document text
    • http://xifonefoje.epizy.com/cannon_36_gun_safe_-_tractor_supply.pdfIn PDF document text
    • http://zijiwaras.onlinewebshop.net/artificial_intelligence_python_course.pdfIn PDF document text
    • http://kofaxafogi.myartsonline.com/motudekarobaloligogopaven.pdfIn PDF document text
    • https://75ca6b5e-a470-4e0e-8004-b00a9f1721b4.filesusr.com/ugd/1e4819_7578d60d2f5342ff813bbe65fab83454.pdf?index=trueIn PDF document text
    • https://3ecb585b-79b8-4502-8567-d9a17299c5c1.filesusr.com/ugd/4b874d_87512bb4e16d478d963fff8528631dbf.pdf?index=trueIn PDF document text
    • http://dukizovisepo.rf.gd/77578854776.pdfIn PDF document text
    • http://media.web.britannica.com/eb-media/41/106741-004-E0EE8460.jpghttps://simpleandinteresting.fileIn 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_off0000e42f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE42F 4580 bytes
SHA-256: 8227c4c8e71c86709cd2a300f62af7f2abe919380230ceee9a6ed8909e2b7e64
font_01_sfnt_off0000f3c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C8 10236 bytes
SHA-256: 28f64000d663c9cc54f71c5fe114ec69cddd40c8e1dbbe978176d678e24c138a
font_02_sfnt_off000116bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116BF 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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