Malicious PDF — malware analysis report

Static analysis result for SHA-256 223026e3706d665d…

MALICIOUS

PDF

87.2 KB Created: 2021-04-29 11:47:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 661fd67476ba43b8ce5d32d2caa929ad SHA-1: 5d15b312b6560cd6fe7fdc9eb39e2d80e7b19c1b SHA-256: 223026e3706d665d3cffc0d87121d8f4fd7a5494b6bd3f48680fc706d92cf046
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-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://lozipotod.ru/strik?utm_term=olympus+om-1n+lenses PDF link annotation
    • http://remontnatali.ru/how_to_display_data_from_database_in_html_table_using_ajax6zb87.pdfIn PDF document text
    • http://deromgroup.com/short_term_goals_for_apraxia_of_speech_in_adultsw6qv3.pdfIn PDF document text
    • https://cdn.sqhk.co/figakeves/1ENCyZd/world_market_glass_top_desk.pdfIn PDF document text
    • http://raifaisentapp.online/verbal_analogies_practice_test3s611.pdfIn PDF document text
    • http://solusaxisabo.scienceontheweb.net/liquidez_definicion.pdfIn PDF document text
    • http://adminhalil.com/physics_chapter_3_describing_motion_study_guide_answersopujy.pdfIn PDF document text
    • https://cdn.sqhk.co/xororofomed/hijaiaQ/tetonetedab.pdfIn PDF document text
    • http://adminhalil.com/97939065521b122i.pdfIn PDF document text
    • http://filemarker.store/can_i_run_microsoft_flight_simulator_2020_on_xboxhvxt3.pdfIn PDF document text
    • https://cdn.sqhk.co/bisuligiga/eigWphF/81675925713.pdfIn PDF document text
    • https://cdn.sqhk.co/nudavede/jfXmjbH/93962515920.pdfIn PDF document text
    • https://cdn.sqhk.co/zadoweferoxe/qGifihj/muxukewiwivapebisiwexopa.pdfIn PDF document text
    • http://hook-up.fun/innovative_teaching_strategies_in_nursing_education_pptyum39.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://53860ffb-5975-4088-b838-5c82367c2827.filesusr.com/ugd/0d2908_dceb63cbfe374fd48a9571f34a3b0e42.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ff56f7a-da7a-47d9-8b47-5745610a2036/20377240727.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d927ac32-8394-438c-9747-ea76d3c861d7/the_little_book_of_common_sense_investing_audiobook_free_download.pdfIn PDF document text
    • https://73f4d879-981c-49fe-abc7-520f36a14a84.filesusr.com/ugd/b77b08_2c4ed23279f147bdab4ae75f2a86d53c.pdf?index=trueIn PDF document text
    • http://wufagezigedo.onlinewebshop.net/10571703461.pdfIn PDF document text
    • http://pizuzol.onlinewebshop.net/taxadamuvo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7394bd37-a6e9-4cd9-a77e-ca13a16ee099/14160651245.pdfIn PDF document text
    • https://6129906d-bc82-46a7-99f5-71793a58af3c.filesusr.com/ugd/d162e3_f4606b3f95f1464b995c57c6e9216e9e.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_off000119a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119A0 4872 bytes
SHA-256: d94abbc8ce796830c7bd2d22699de8b2cb4d2f03bbd870f6673a20f32449059f
font_01_sfnt_off00012a3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A3A 11440 bytes
SHA-256: 81ca1e6964609affe311fbdfdd054d17b8977e8fd52b460ad20d44cd80953483

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