Malicious PDF — malware analysis report

Static analysis result for SHA-256 623b6930c46b3a67…

MALICIOUS

PDF

70.8 KB Created: 2021-03-24 17:28:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 06a36f68bb6f4c28c354a1a12a195c9b SHA-1: 9f5ffbdabeb8a70c63be7ce5d433883d6d77b347 SHA-256: 623b6930c46b3a6754ccffe2b4b14da3549f9fed0bcc8706efae7c62b891f6a2
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a primary suspicious URL pointing to a domain associated with phishing or malware distribution. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicates a pattern of using disposable hosting for link farms, further suggesting malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing lure designed to redirect users to malicious content.

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://gimoguvi.ru/wix?keyword=westward+expansion+worksheet PDF link annotation
    • http://tuligofabuwisa.22web.org/ardaas_movie_song_free.pdfIn PDF document text
    • http://dofujifeluradep.medianewsonline.com/67581157611.pdfIn PDF document text
    • http://katipef.medianewsonline.com/apostrophe_paragraph_worksheet.pdfIn PDF document text
    • http://teguruta.medianewsonline.com/30973248597.pdfIn PDF document text
    • http://solasaxutegi.iblogger.org/93106199436.pdfIn PDF document text
    • http://tolizidusinakil.22web.org/devexpress_reports_demo_winforms.pdfIn PDF document text
    • http://pebonemariv.mypressonline.com/sirabasinibi.pdfIn PDF document text
    • http://manovina.mypressonline.com/10038579823.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/0d496c54-3e06-4127-a9dd-cbd468b8d6b1/wolf_of_wall_street_quotes_funny.pdfIn PDF document text
    • http://luwefotikejumu.rf.gd/resume_format_for_accountant_assistant.pdfIn PDF document text
    • http://rewezaxow.epizy.com/solving_equation_word_problems_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc7c6f5e-6b70-4ec9-a148-391a7552e30a/jaffe_anesthesiologists_manual_of_surgical_procedures_online.pdfIn PDF document text
    • http://dupumimegijema.epizy.com/how_to_pass_the_permit_test_in_ny.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f82a2fd-d2ad-4d1d-b8f9-eadbe410a98f/84150094722.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/199bce4b-dee2-41c1-84ed-c44a5f15559a/96795057151.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f39d9d5c-d743-4364-870c-66e0a937a6a9/english_composition_clep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12268635-4930-45c6-a2b0-dd2a96d05188/the_return_of_the_king_1980_watch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a9073d7-d3b9-45fc-a9d6-30dc86747090/mbti_personality_type_test_results.pdfIn PDF document text
    • http://bajewilogofiro.epizy.com/putin.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_off0000d7a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A9 5252 bytes
SHA-256: 19a11d4124ed94fce246cfadd37c1dab21e367b84a1b9130b7445a209296569c
font_01_sfnt_off0000e99a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE99A 10760 bytes
SHA-256: a0184fa95bde7727d25d556b89865bd34355151dfe549acf1ad064f83dffe1ad

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