Malicious PDF — malware analysis report

Static analysis result for SHA-256 4659a1f85fb35eab…

MALICIOUS

PDF

74.1 KB Created: 2021-03-21 01:45:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 3bd1ae6827015eb415d03aab910899fe SHA-1: e378d4eff92e4dda436423b2f057aa0a9c2d2911 SHA-256: 4659a1f85fb35eab65b3fb9a5d3c017a68b4fc1354ff4e7b440d0f96927571b3
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one heuristic specifically identifying it as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/strik?utm_term=kidde+nighthawk+combination+smoke%252Fco+alarm PDF link annotation
    • http://mamajan.space/factorising_harder_quadratics_maths_genie_answersiswti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381091/normal_60453a0a0632b.pdfIn PDF document text
    • https://cdn.sqhk.co/zopizote/5hj5Eib/21584107559.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468836/normal_5ff7968c6117a.pdfIn PDF document text
    • https://cdn.sqhk.co/foxuninulini/gdN8yif/dish_anywhere_activate_fire_tv.pdfIn PDF document text
    • http://smm-target.ru/arduino_language_codexmqxk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530846/normal_604627ae56e39.pdfIn PDF document text
    • https://cdn.sqhk.co/nafumozuwe/SHSPvZQ/vodizerilofumesikuxelafid.pdfIn PDF document text
    • http://cloudmarket.website/percy_jackson_first_book_plote9ol7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463791/normal_6048156c409c8.pdfIn PDF document text
    • http://sawalaxal.66ghz.com/android_show_remembered_wifi_password.pdfIn PDF document text
    • https://cdn.sqhk.co/pemanunid/khd6HJl/malum.pdfIn PDF document text
    • http://wadopipojadali.iblogger.org/40657762757.pdfIn PDF document text
    • http://gmetry.online/wotevemigsoi6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/luxelula/australian_super_choice_income_account_application_form.pdfIn PDF document text
    • https://4bd9ed84-c80b-4837-bb2f-b1353ebfd8aa.filesusr.com/ugd/5a1791_d3cc154e168644b68583ac6d1ddd136a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xapota/jocko_willink_discipline_equals_freedom_audible.pdfIn PDF document text
    • http://tekabexorita.rf.gd/bug_out_bag_guns.pdfIn PDF document text
    • https://1cbf0fd9-62af-4102-a3dc-982f361539e7.filesusr.com/ugd/bfbc46_e26c2343f54d4d9fab563d5c9e6f5c9e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sojaxub/basic_algebra_collecting_like_terms_worksheet.pdfIn PDF document text
    • https://ddb1515c-011f-4d6c-9a6c-b305a2039a85.filesusr.com/ugd/477ac5_54f9d99159994a23a8e2b9c6a0040d1f.pdf?index=trueIn 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_off0000e265.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE265 5652 bytes
SHA-256: e270b1cf6a6f0b0f49f2158cc1541bb585fc4a51578db9049daeee2c88306117
font_01_sfnt_off0000f58e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF58E 10928 bytes
SHA-256: 572da3ab1e12f02cd3b32dffe35cf598de52e7c2a63f31fe5da2cbea455bbd27

Open this report in the interactive analyzer, or submit your own file for analysis.