Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1dc13d97b964a68…

MALICIOUS

PDF

80.6 KB Created: 2021-05-05 20:34:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 79b5ac4f1ff1a64525dd971aced2339c SHA-1: 9978f2145486cd5a13c641d6fc83ff5fe3107c73 SHA-256: f1dc13d97b964a68c059978d233584225423aee0f542174bc7c4161ca0d45fac
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 0.9993

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://golowaki.ru/strik?utm_term=how+to+use+vivitar+camera+as+webcam PDF link annotation
    • http://gumelup.iblogger.org/minions_2015_subtitle_indonesia.pdfIn PDF document text
    • https://cdn.sqhk.co/wozovege/i4MnZjj/meeting_points_template.pdfIn PDF document text
    • http://sewaluxedidijug.iblogger.org/supercuts_coupon.pdfIn PDF document text
    • http://edevletorg.com/61326611412qloin.pdfIn PDF document text
    • http://bcpzonasegur4viabcp.com/idle_heroes_tier_list_2020ccvlh.pdfIn PDF document text
    • http://migerov.xyz/gobodenixitim9swzn.pdfIn PDF document text
    • http://indir-kazan.com/3206019060618huz.pdfIn PDF document text
    • http://clebohets.xyz/larson_calculus_textbook_answersd5jtd.pdfIn PDF document text
    • https://cdn.sqhk.co/pixefavenar/d2jbmdm/yeet_meaning_2020.pdfIn PDF document text
    • http://50offshop.pro/washington_dc_weather_december_5_2018061sh.pdfIn PDF document text
    • http://wofudanupata.22web.org/6295467754.pdfIn PDF document text
    • http://poradoit2.site/convert_action_file_tosup0s.pdfIn PDF document text
    • http://cmb-eco.com/pivukusoysvyg.pdfIn PDF document text
    • http://zusagukitu.mywebcommunity.org/lagikibejesujivozoxufefan.pdfIn PDF document text
    • http://nigemutekilum.mypressonline.com/free_printable_blank_bingo_cards_for_teachers.pdfIn PDF document text
    • https://cdn.sqhk.co/pofaxexaxi/euAVhhD/top_50_nursery_rhymes.pdfIn PDF document text
    • http://zaxegod.getenjoyment.net/que_significa_que_tu_mama_se_muere.pdfIn PDF document text
    • https://cdn.sqhk.co/tubawonidas/Ghggihi/throne_rush_mod_apk_unlimited_all.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xebedosifemopan.epizy.com/xafogepadowoledajubowa.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/android_create_bitmap_from_drawable_resource.pdfIn PDF document text
    • https://s3.amazonaws.com/ribowexulo/47956513401.pdfIn PDF document text
    • http://volefogadevo.epizy.com/98466213397.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/wobutemesexiremarunata.pdfIn PDF document text
    • https://s3.amazonaws.com/gaxuremewuger/aw_tozer_the_attributes_of_god.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_off0000fd18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD18 5168 bytes
SHA-256: 62f361495f47db70ac733959d27f82aa0f7432571b6decff8aa9f79c9e3dafd9
font_01_sfnt_off00010ea9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA9 11132 bytes
SHA-256: 0f358619f4a240c1903048a6b3ca103396888ac0679f792f6c7f93e1f46d3e57

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