Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ab7a393b6b400e1…

MALICIOUS

PDF

83.2 KB Created: 2021-03-30 17:06:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 1b3d3e2479dbf7d69ea1eb09d80bd361 SHA-1: 171c74e1d327d4844c1e902ad4eb5054e83b96a3 SHA-256: 3ab7a393b6b400e1a7fdd6c31c5f18d26cf61ffcd69f85541295b73e2a9ab192
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 0.9998

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://jottigo.ru/strik?utm_term=rslogix+5000+programming+software+download PDF link annotation
    • http://nuwetiveguvo.mypressonline.com/academic_english_vocabulary.pdfIn PDF document text
    • https://cdn.sqhk.co/wodigajamu/ieggQhd/somofiruwinijopaxopi.pdfIn PDF document text
    • https://cdn.sqhk.co/gujowaxexag/egehgHE/soulier_antiderapant_femme_yellow.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467274/normal_5fc74f55a74de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456420/normal_5fda5db173607.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/hgjfEja/pdf_annotator_free_portable.pdfIn PDF document text
    • http://fopokigife.mywebcommunity.org/lasko_48_xtra_air_tower_fan_with_fresh_air_ionizer.pdfIn PDF document text
    • http://dizurexemubegog.mygamesonline.org/free_online_translator_spanish_to_english.pdfIn PDF document text
    • https://cdn.sqhk.co/kakapoxavu/cjjanib/gokixujanikigomeb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459654/normal_5fddbd1f9026b.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/19a3e17b-f1ca-40d7-93a0-c39f776e5d6d/brother_mfc-j5910dw_inkjet_printer_service_manual_and_parts_catalog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ad409c8-cd59-4b3f-bf8d-efcc864b78ef/motorola_2-way_radio_surveillance_headset_with_push-to-talk_microphone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad04ffd6-1a43-4b10-8989-a24253105edc/zuraluzuxadet.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/when_to_go_to_hospital_for_suicidal_ideation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e2328a9-f410-4dcb-baea-8457228e53a8/before_we_were_yours_book_review_questions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/358f5207-2429-46e9-83c1-639073a67b28/vabagimanujit.pdfIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/how_to_disconnect_quick_connect_heater_hose.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a13cf918-7723-4d37-9bf1-82f49726e53d/xexun.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/essentials_of_human_anatomy_and_physiology_lab_manual_marieb.pdfIn PDF document text
    • https://s3.amazonaws.com/lanaladu/41027960992.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_off000103cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103CB 5792 bytes
SHA-256: 761085380216601ab51eef713c36377c39ea7e365227cea312eb4ef8752409e6
font_01_sfnt_off00011791.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11791 11268 bytes
SHA-256: ca13649cfa1b974dae5eae50d5d5189dba3be860a75b7327f481d94adb6f6868

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