Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eaa716808983a5d…

MALICIOUS

PDF

82.4 KB Created: 2021-06-03 20:47:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: adac88e571caa4e17ecd35ca988b9788 SHA-1: 551910dc590a07c2775d650d84e3425189d93498 SHA-256: 0eaa716808983a5d90ce9dafb7e5409597129172bedbae8137c92980624f7bea
126 Risk Score

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 0.9950

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://garglob.ru/pbw?utm_term=how+to+use+blue+yeti+microphone+on+xbox PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4443578/normal_5ff0a8fb46437.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372378/normal_601b717b9404f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485799/normal_60613399cb594.pdfIn PDF document text
    • https://suxewanevot.weebly.com/uploads/1/3/4/5/134595646/jenegudegixekijoza.pdfIn PDF document text
    • https://tasuvoni.weebly.com/uploads/1/3/4/6/134690764/gabutumate.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394079/normal_6052e0c0eacb6.pdfIn PDF document text
    • https://modulofironufi.weebly.com/uploads/1/3/4/4/134402713/8960901.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422135/normal_5ffa55655d0c0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://puzavofan.pbworks.com/f/kariwedolopuvoru.pdfIn PDF document text
    • http://memofemovo.pbworks.com/w/file/fetch/144555774/zekemuxosebifolawurojuli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de5cc5df-97a9-4baf-a5bb-6c2c2711814a/how_to_set_a_armitron_sport_watch.pdfIn PDF document text
    • http://fipivuzigoge.pbworks.com/w/file/fetch/144424401/mizowezan.pdfIn PDF document text
    • http://gazumadu.pbworks.com/f/dragon_ball_z_tenkaichi_tag_team_psp_para_descargar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c3908f7-041b-4cc8-8fe1-016893ab66f8/55932795546.pdfIn PDF document text
    • http://mefijunov.pbworks.com/f/zulenumelopiwugugorosom.pdfIn PDF document text
    • http://mevuteled.pbworks.com/f/logo_quiz_level_1_answers_cheats_solution.pdfIn PDF document text
    • http://fulusivijomu.pbworks.com/f/evan_moor_corp_daily_reading_comprehension_grade_5.pdfIn PDF document text
    • http://ziriwuru.pbworks.com/w/file/fetch/144565251/87388624046.pdfIn PDF document text
    • http://nadupodifado.pbworks.com/f/jurassic_park_theme_song_mp3.pdfIn PDF document text
    • http://fuvesiwowegu.pbworks.com/f/davizabaxererabixavi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6dbdb1c-5b97-4fd4-88fa-0a0a18ad0a34/windows_10_free_upgrade_from_7_download_full_version.pdfIn PDF document text
    • http://fevosezew.pbworks.com/f/how_to_study_for_nasm_exam.pdfIn PDF document text
    • http://veweran.pbworks.com/f/68771380961.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a805f5fb-6de8-4dfd-954d-8d159224c86e/what_is_a_falling_action_in_a_plot_diagram.pdfIn PDF document text
    • http://jesababa.pbworks.com/f/nisawa.pdfIn PDF document text
    • http://letonepamusi.pbworks.com/w/file/fetch/144453966/exam_ref_70-761_download_free.pdfIn PDF document text
    • http://mukibilevejo.pbworks.com/w/file/fetch/144467964/are_h7_led_bulbs_legal.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF8F 5324 bytes
SHA-256: 678f278a75c3a4fedce60eb64ef92f879689acf51a7ab4b50c69db3a1dea5720
font_01_sfnt_off00010198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10198 10680 bytes
SHA-256: d2dabb1f008f4e8156649ac2f7007a2366af0bda0cfa6f1a5af9af5e719b5979
font_02_sfnt_off0001263f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1263F 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd