Malicious PDF — malware analysis report

Static analysis result for SHA-256 2311c2fe2fd1e96c…

MALICIOUS

PDF

112.4 KB Created: 2021-04-03 22:08:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 31cab2f63255f7dd51097a01b3bcd7a0 SHA-1: be6d13919b6fb3f98450bcd212aa59842375ab7e SHA-256: 2311c2fe2fd1e96cfd678a1b997b3295b4a4305788eb02c50552a23f03818617
126 Risk Score

Malware Insights

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

The PDF contains multiple external URIs, with one specifically pointing to a URL containing 'strik' and a search term, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing. Although no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it is designed to lead users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://kuzutuzo.ru/strik?utm_term=bardo+thodol+definition PDF link annotation
    • http://xoroketogejuxe.mywebcommunity.org/73512432801.pdfIn PDF document text
    • https://xabesokexiba.weebly.com/uploads/1/3/4/3/134327988/c5a86be83eb05b.pdfIn PDF document text
    • https://fajorisovobune.weebly.com/uploads/1/3/4/7/134752278/fb982a35ef7d.pdfIn PDF document text
    • https://cdn.sqhk.co/kegetaxob/fgdhc2k/79546606086.pdfIn PDF document text
    • https://cdn.sqhk.co/lopumilekana/mjcgcjd/send_money_online_via_ria_money_transfer.pdfIn PDF document text
    • https://cdn.sqhk.co/vidikusupegu/cT0rUWT/roku_secret_menu_cec.pdfIn PDF document text
    • http://koponegigat.medianewsonline.com/3672949921.pdfIn PDF document text
    • https://jefamiwufilidiv.weebly.com/uploads/1/3/1/4/131409158/tapagapo.pdfIn PDF document text
    • https://cdn.sqhk.co/pixazizaze/h4wjbIt/gitumogelej.pdfIn PDF document text
    • http://babubusawase.22web.org/network_engineer_interview_questions_and_answers_for_freshers.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.thdl.org/http://www.thdl.org/TibetanIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://4a7d9d2b-1d67-446c-8d6d-bdd3043d1f60.filesusr.com/ugd/c3d078_3108ea38ef584fc1ab0fe557362ea4c4.pdf?index=trueIn PDF document text
    • http://kesolimasakifi.myartsonline.com/business_analytics_certification_reddit.pdfIn PDF document text
    • https://0ca3454e-05ac-49fc-8d00-644b1af7be3c.filesusr.com/ugd/8bf3fc_7df91821449244e5a51ec2a905997ad3.pdf?index=trueIn PDF document text
    • https://44bb6ee8-a0fe-4f72-890f-0f0a2fec05cf.filesusr.com/ugd/b65acf_fa1ccaca973a4691909b17016914f319.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4c6b8f2-c658-424c-91c6-3bf0e92dd352/tosozagopas.pdfIn PDF document text
    • http://gawutapiji.rf.gd/forever_young_chords_lyrics.pdfIn PDF document text
    • http://suteduzadu.epizy.com/tukime.pdfIn PDF document text
    • http://dexivovadoxexo.myartsonline.com/airforce_question_paper_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/656abc9b-01af-4d5c-856f-fd7e696282f0/44505257520.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e990621-59a9-42e2-a65f-27346ca98f64/no_game_no_life_fanfiction_sora_x_reader.pdfIn PDF document text
    • http://motatowavem.epizy.com/sample_resignation_letter_template_for_teachers.pdfIn PDF document text
    • https://0a38098d-26c8-4844-ab0b-2dfc398d7f8d.filesusr.com/ugd/fffd55_0913a5c4a71e45d2a8140ae16443f6cc.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
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlTibetanIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11170 13724 bytes
SHA-256: a1ee5119944117880b4db7b535938998cf2e54f1c1518c2d8616a4d25f024d5d
font_01_sfnt_off00013dfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DFB 4868 bytes
SHA-256: c70c93cf377fa9353118370c9dcf25a8399ecbfb1e0312cb3ef60cb1f6485ced
font_02_sfnt_off00014e84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E84 9280 bytes
SHA-256: 4e9e25efde7bda35ea2e0dc1fa7a2d066c89f333caab3d9290b51465a0c184c2
font_03_sfnt_off0001617a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1617A 15732 bytes
SHA-256: 9961f994bc1deb832b67aefe07fb4d16f6f0119903705ae8e5a3062e0381ef78
font_04_sfnt_off00018f69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18F69 16460 bytes
SHA-256: 9118bf2921e0ff47dda581d09f6112fc90c9f8c16299c02be3f9fcdcf9502592
font_05_sfnt_off0001a621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A621 2824 bytes
SHA-256: 96841e4a4d9306add1462e80e60f02d20f34d8ec3d0d284bace8bdc54fe7cd22

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