Malicious PDF — malware analysis report

Static analysis result for SHA-256 233bbb64b181fc7c…

MALICIOUS

PDF

73.8 KB Created: 2021-05-17 20:08:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a48add7ce2d18809f8575eae53bab26d SHA-1: 8b52c1a3ce1c52c49c53201c9cc2ede6c2bf33cb SHA-256: 233bbb64b181fc7c62d113526aa474052151a1513c84d34a4f8f8983ffedbdf5
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://zajinet.ru/strik?utm_term=stihl+trimmer+line+price PDF link annotation
    • http://jadogedixonow.iblogger.org/what_is_the_social_cognitive_learning_theory.pdfIn PDF document text
    • https://cdn.sqhk.co/tixuniwe/gnt0haX/60615376305.pdfIn PDF document text
    • http://big-ita.space/jixesanixalikakeketimu4069v.pdfIn PDF document text
    • http://50off.pro/west_plains_glass_sword_cinema_6508bj.pdfIn PDF document text
    • http://899themes-demo.ru/24203926483lit48.pdfIn PDF document text
    • https://cdn.sqhk.co/medefitama/rjahgdF/jilebawiz.pdfIn PDF document text
    • https://cdn.sqhk.co/malevevipali/hchejdQ/velejexovuzuloxoxatijox.pdfIn PDF document text
    • https://cdn.sqhk.co/pabopimi/hj0GZhj/pezad.pdfIn PDF document text
    • http://mybatut.store/graco_snugride_click_connect_35_car_seat_and_strollerarsgb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0dc5fd1c-b354-4e5b-9ccd-45395e8994ed.filesusr.com/ugd/f79e8d_87fa94646d7640dc91c9e2973423bf2f.pdf?index=trueIn PDF document text
    • http://fadakivok.rf.gd/45998272585.pdfIn PDF document text
    • http://kezaforow.epizy.com/aktiebolaget_skf_annual_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52098375-e576-4101-8b25-c19363543c2a/planet_fitness_contract_length.pdfIn PDF document text
    • https://0ed7c29b-d5f2-4290-8b47-add6aa38300d.filesusr.com/ugd/32a223_64d81099f4e645d3bfc4234668d3f766.pdf?index=trueIn PDF document text
    • https://06e27459-8a58-4d01-a48e-f853eab966f6.filesusr.com/ugd/55f1a0_0f36107117e440b1a568740a99a8b391.pdf?index=trueIn PDF document text
    • https://3ced707c-20bd-49bb-93f1-edb15be4e391.filesusr.com/ugd/e90305_a5e447a7ac0342849d5d8716bc8dfb93.pdf?index=trueIn PDF document text
    • https://e0eedba4-cf99-4c42-97f5-d3f9ae5832dd.filesusr.com/ugd/e36ea7_953216880a4a41629b75b980400b124d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7197094b-a56b-4adb-bd2a-a0c045913f43/tin_tin_cartoon_images.pdfIn PDF document text
    • https://507f79ed-2408-4027-b124-45ed49bded7d.filesusr.com/ugd/2de61b_159c1fbb8f8c4dc484ba0236bbca5e52.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1c283bd-5b6c-4252-aab7-972cb9fbd464/gawekefajaxujuzoze.pdfIn PDF document text
    • https://37e0f79d-b0c1-4727-b76d-5b759c81288f.filesusr.com/ugd/9c66ff_0660c618bede4ba8a1417e444b35d3e4.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_off0000e460.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE460 4888 bytes
SHA-256: 91f161c4be8c1ec29914c8b020434c80d1b0c761b1001540ae6b55ea0806b1c2
font_01_sfnt_off0000f4d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D9 11072 bytes
SHA-256: afca72cb0ff46477ba432450f572f04c9c8b9ecde4f8f5851a2d7875deb361b2

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