Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fd66287315f8bec…

MALICIOUS

PDF

83.7 KB Created: 2021-02-17 15:43:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: b177b78be549565a89ed68c616ec4c15 SHA-1: 0c3071f25ca80f9558f4ae43af6a9f4888b62bca SHA-256: 9fd66287315f8bec05a2e99fbe50790ad5741bbee6d98d6e5d3dc4aa9dc77624
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or trojan distribution attempt. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, appears to contain keywords related to sewing machine manuals, likely serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://maypoin.ru/wix?keyword=janome+sewing+machine+manual+sewist+521 PDF link annotation
    • https://cdn.sqhk.co/joxipadij/s1zfejd/venmo_app_not_working.pdfIn PDF document text
    • https://cdn.sqhk.co/luwukamuku/9hiehhj/uber_driver_app_process.pdfIn PDF document text
    • https://cdn.sqhk.co/wememiguw/LOxieVh/hearthstone_deck_tracker_battlegrounds_heroes.pdfIn PDF document text
    • https://cdn.sqhk.co/detazido/aiihiic/zig_zag_zoom_level_c.pdfIn PDF document text
    • https://cdn.sqhk.co/jonuwezipagi/cgiNjip/9348663533.pdfIn PDF document text
    • https://cdn.sqhk.co/tikalamin/AZX1iei/stumble_meaning_in_tamil_translation.pdfIn PDF document text
    • https://cdn.sqhk.co/jidevumedure/gjjgZjc/free_mobile_movies_2019_download.pdfIn PDF document text
    • https://dinabowufijub.weebly.com/uploads/1/3/4/7/134751612/99c4ed4cf25f10.pdfIn PDF document text
    • https://cdn.sqhk.co/sewujuzanas/ghdheZP/nosovubawemuvegoduvad.pdfIn PDF document text
    • https://xefafarorul.weebly.com/uploads/1/3/4/6/134698093/8aa499ace263.pdfIn PDF document text
    • https://cdn.sqhk.co/tobipamu/cowiiie/dhoom_3_bike_scene_video_download.pdfIn PDF document text
    • https://cdn.sqhk.co/wuwovodegi/jg3Oohh/hearts_of_iron_4_wiki_fandom.pdfIn PDF document text
    • http://zufabud.22web.org/forma_anormal_definicion.pdfIn PDF document text
    • https://cdn.sqhk.co/kuvapipitol/ierjjBp/square_bird_game_free_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jufakoxageponuz.rf.gd/wenetonoga.pdfIn PDF document text
    • http://waxukoke.epizy.com/13541059354.pdfIn PDF document text
    • https://s3.amazonaws.com/sagotomagin/ansi_c_compiler.pdfIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/30544006195.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/jefijibilixekiz.pdfIn PDF document text
    • http://wawukekaxemiju.epizy.com/dofefidokuna.pdfIn PDF document text
    • https://s3.amazonaws.com/kimone/us_customary_unit_conversion_length_worksheet_answers.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_off00010b75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B75 5504 bytes
SHA-256: 25131f63b4b234d81fb9b3a4c2ec8b808108cc8c525be37f742ab0dc964f3cb3
font_01_sfnt_off00011e31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E31 10184 bytes
SHA-256: 29c4165074627d76cf8081b45d49ee9fbd7efe44d92b041bfc36990858702116

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