Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bb078551fb5d46e…

MALICIOUS

PDF

84.0 KB Created: 2021-04-28 23:45:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4f2c277545ac03d2658784681228c00c SHA-1: 1047cde6d650427bd1b7e44d5f8d730f3014584c SHA-256: 9bb078551fb5d46e88ec4a35b6b6fed2a6aa4d2e31e013e108a68e91d24bd264
186 Risk Score

Malware Insights

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

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 0.9990

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://soxebez.ru/strik?utm_term=how+to+reply+to+an+internship+offer+email PDF link annotation
    • https://fosobezi.weebly.com/uploads/1/3/4/8/134898374/3647594.pdfIn PDF document text
    • http://rowowevu.mypressonline.com/jessica_merchant_of_venice_character_sketch.pdfIn PDF document text
    • https://vegekonewipure.weebly.com/uploads/1/3/5/9/135964828/xoxigefoke_wixejomoronexox.pdfIn PDF document text
    • https://cdn.sqhk.co/naludibeg/3gjjj2E/turinimebu.pdfIn PDF document text
    • http://wewogokuwidu.mywebcommunity.org/the_decisive_moment_by_henri_cartier-bresson.pdfIn PDF document text
    • https://cdn.sqhk.co/dutudovajud/baRjjjg/super_mario_run_full_game_apk_android.pdfIn PDF document text
    • https://widosogepe.weebly.com/uploads/1/3/3/9/133986955/xojojifukoj.pdfIn PDF document text
    • https://zasufademebarav.weebly.com/uploads/1/3/4/7/134737005/retenavazot.pdfIn PDF document text
    • http://wubujonil.getenjoyment.net/patriotism_vs_nationalism.pdfIn PDF document text
    • http://tesekal.mygamesonline.org/baxter_robot.pdfIn PDF document text
    • https://cdn.sqhk.co/tinawegu/d85R5ih/easy_movie_scenes_to_act_out_at_home.pdfIn PDF document text
    • https://cdn.sqhk.co/matezafun/hjbjjgi/nemoxilobokuluvelogogo.pdfIn PDF document text
    • https://luvegiramoki.weebly.com/uploads/1/3/3/9/133986347/0386982.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/1824a390-4f9f-45e4-a19c-1d7fbb16a1eb/autocad_3d_drawing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4378992e-57e0-46c1-9f22-5c57cb356ef9/setting_personal_development_goals_work_examples.pdfIn PDF document text
    • http://mugazukadum.onlinewebshop.net/94172243084.pdfIn PDF document text
    • https://s3.amazonaws.com/benubapopikaj/school_trip_permission_slip_template.pdfIn PDF document text
    • https://923a8ca3-316b-4844-b38f-9bc955ad4852.filesusr.com/ugd/312e0e_472e35db8a28476699aa033ffc7ca9d7.pdf?index=trueIn PDF document text
    • https://6d23287f-a15b-43b7-8d69-700c0e01f504.filesusr.com/ugd/185c00_8257be8c94384ba39dd84f69dea7002b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lowebemuwojiso/public_relations_certificate_online_canada.pdfIn PDF document text
    • https://9e730ba1-499c-413e-9a09-8a81f8121270.filesusr.com/ugd/0a0016_d22f9c2a1e334486a6ee27508c07ea1c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/stock_market_courses_online_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f438c34f-6e64-4c0f-83cf-91b1fdf4e2dc/82469026416.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ec0055a-de5c-4e52-ad81-32e5a0079466/vozedetididugib.pdfIn PDF document text
    • https://s3.amazonaws.com/gujutavevive/fafujezabuvo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC28 5084 bytes
SHA-256: 5c8024f0f495e5d1bd6da71c16ea4e51437a1cab0aacbf910f4ceb3fda8ca92d
font_01_sfnt_off00010d4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D4B 11140 bytes
SHA-256: c0064b56d9eb54a4efe6f1f0891642ebe32c5c8a88b01fa543557a3abf8d2206
font_02_sfnt_off00013375.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13375 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c