Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5b8f3fdc150faac…

MALICIOUS

PDF

86.4 KB Created: 2021-04-21 21:45:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 64918f4156b7ace49544d482d92b0e33 SHA-1: dafd3179e4cfa41b084d7bd434a584ccaf923f8a SHA-256: b5b8f3fdc150faaca1ec15e61d48bcb74d219fcaaacd6002e2c4d4477a3822f3
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 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/strik?utm_term=download+driver+may+in+brother+hl-2240d+win+7+32bit PDF link annotation
    • https://cdn.sqhk.co/bogijifaviba/jfibSja/66356236307.pdfIn PDF document text
    • http://fasekafalig.scienceontheweb.net/14112343364.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385427/normal_6037f2e38659c.pdfIn PDF document text
    • http://idealslimitalia-ufficiale.site/28545309330ej0gj.pdfIn PDF document text
    • http://rejasikega.scienceontheweb.net/samsung_50_inch_qled_4k_uhd_smart_tv_-_qn50q6dtafxza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376612/normal_603ce0897509c.pdfIn PDF document text
    • http://sukutoxuwurif.mywebcommunity.org/lufudadixivovuzojupugo.pdfIn PDF document text
    • http://zizodoroluxonaf.sportsontheweb.net/effective_half_life_time_calculation.pdfIn PDF document text
    • http://sexesex.site/chronological_bible_app_for_iphonebbeem.pdfIn PDF document text
    • https://cdn.sqhk.co/zimevegi/3Mnjhjh/97447497026.pdfIn PDF document text
    • http://vykupavto54.ru/857628853848wclp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449987/normal_60214d1ebad74.pdfIn PDF document text
    • https://cdn.sqhk.co/wofunukasu/iazhdaZ/sidagoruvajedajuzufef.pdfIn PDF document text
    • https://cdn.sqhk.co/fosuzonarefi/ifgjmgi/age_discrimination_definition.pdfIn PDF document text
    • http://kolomata.ru/samsung_32_class_fhd_1080p_smart_led_tv_un32n5300_reviewbwdqn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450870/normal_600da59da5659.pdfIn PDF document text
    • http://bamiluzigu.mygamesonline.org/sweet_beulah_land_sheet_music_free.pdfIn PDF document text
    • http://vedice.ru/gre_general_test_math_practice_questionsgmksg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fujadabez/reekie_architectural_drawing.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/pick_image_from_gallery_android_nougat.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/simple_splash_screen_in_android_studio.pdfIn PDF document text
    • https://s3.amazonaws.com/tesapibebujep/87479815096.pdfIn PDF document text
    • http://sagoralezerelo.onlinewebshop.net/arifureta_web_novel.pdfIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/destiny_2_leviathan_raid_guide.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_off0000fdc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC3 5920 bytes
SHA-256: 731f7b96a9ddf13e5d63633a4096266d5b901b3d11f43fd427decb69661a9c58
font_01_sfnt_off000111f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111F5 26108 bytes
SHA-256: ef6fa2fa41ab80fe5ef3e5a3efebcc0a9cf3a5a758dfcf8c978ba5ea1cbe6d28

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