Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5a978adc36aaa8a…

MALICIOUS

PDF

81.2 KB Created: 2021-03-16 10:46:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 174697544e6492d7c80cde9109f8ee55 SHA-1: e796468b88c45b5120012f293337a19c08eedd54 SHA-256: c5a978adc36aaa8adbeec632381b48e44a25794fac3988a11cc2e5416cbfa81a
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://druttle.ru/award?keyword=image+guided+and+adaptive+radiation+therapy+pdf PDF link annotation
    • https://cdn.sqhk.co/petebeki/0lBKjba/cannonball_tv_show_winners.pdfIn PDF document text
    • http://itfamily.info/199760017693pkv1.pdfIn PDF document text
    • http://top-shop-store.website/greenleaf_season_4ihtul.pdfIn PDF document text
    • http://daddytestit.xyz/qu_idiomas_se_mezclan_en_palabras_como_parquear_y_chequeari5qik.pdfIn PDF document text
    • http://zumewidife.mygamesonline.org/where_can_i_watch_the_art_of_racing_in_the_rain_online.pdfIn PDF document text
    • http://sokobumoxagug.scienceontheweb.net/xumenapafejubakefezoketif.pdfIn PDF document text
    • http://spindlndou.space/is_construction_hard_to_learnb3d8e.pdfIn PDF document text
    • http://com-signto2.xyz/cujo_stephen_king7zq38.pdfIn PDF document text
    • https://cdn.sqhk.co/fejisunez/cgeaIgj/xagomarebodopifo.pdfIn PDF document text
    • https://cdn.sqhk.co/webuzifinuno/IhgBje7/sea_game_mega_carrier_apk_android_oyun_club.pdfIn PDF document text
    • http://sadovik.me/fewadaneloluzugimiy8xsf.pdfIn PDF document text
    • https://cdn.sqhk.co/gosukutusu/Fhhziia/ripiroteduru.pdfIn PDF document text
    • http://meetsalle.xyz/sujil9g4hq.pdfIn PDF document text
    • https://cdn.sqhk.co/busoleva/cfhjjhP/bemexusijijuzojid.pdfIn PDF document text
    • http://nesebonuvobeju.getenjoyment.net/32952559850.pdfIn PDF document text
    • http://milesnires.xyz/xorubatowuvovutinex6vkhi.pdfIn PDF document text
    • https://cdn.sqhk.co/dabozijide/5giihnJ/32950040730.pdfIn PDF document text
    • http://vas-rem.ru/4641573379047lr7.pdfIn PDF document text
    • https://cdn.sqhk.co/sezepemanu/icjgGpl/54652395073.pdfIn PDF document text
    • http://lightly.store/z6dds.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/lorifawuvawot/91889159465.pdfIn PDF document text
    • https://s3.amazonaws.com/rojalexipokadaz/employment_verification_letter_template_word_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/kimone/jagenagexewakaniwub.pdfIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/easy_video_cutter_pro_apk_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/34707992052.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_off0000faf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF9 5344 bytes
SHA-256: ea7e07bb5b07585cca9169b2d04698ce5f4027ddc0af4d947335e5319cc33651
font_01_sfnt_off00010d0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D0E 13108 bytes
SHA-256: f74ae2ba4271998ee04e93ea4d8f3a2c477bba5cc06696acf7cea0b2cd08a4fd

Open this report in the interactive analyzer, or submit your own file for analysis.