Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a4dfe1628586035…

MALICIOUS

PDF

86.2 KB Created: 2021-03-06 12:30:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 67d15b9b376f2f2523e6681e85ef732e SHA-1: 10d1aa40871593f23636f8f33405a11b12d56635 SHA-256: 9a4dfe1628586035b597fd8f719ab7ef76ad1a2083da2a3e71b96eb71ac724d9
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 0.9996

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://crophysi.ru/123?utm_term=world+of+greyhawk+wiki PDF link annotation
    • http://lollipopa.online/xuwezakati44qdf.pdfIn PDF document text
    • http://streamsweets.com/hp_designjet_500_42_driver_64_bitqjrxf.pdfIn PDF document text
    • http://ninotekega.mygamesonline.org/86856678031.pdfIn PDF document text
    • http://astrology-personal.online/xakuwozexorzzffh.pdfIn PDF document text
    • http://bcpzon4segurabetaviabcp.com/the_school_for_good_and_evil_book_1_review6wpdv.pdfIn PDF document text
    • http://plafond.xyz/no_puedo_cambiar_el_formato_de_fecha_en_windows_10od9u1.pdfIn PDF document text
    • http://wipunemobak.mygamesonline.org/nc_drivers_license_office_near_me.pdfIn PDF document text
    • http://canonsburglake.org/samsung_bd-j7500_firmware_updateozd30.pdfIn PDF document text
    • http://kittyplay.online/how_to_factory_reset_a_nintendo_dsi_xlj8v61.pdfIn PDF document text
    • http://jekenufakewe.mypressonline.com/gexusoxunumupomozeribibem.pdfIn PDF document text
    • http://hydrofthol.space/guguwuriwolisupojazoxi07m.pdfIn PDF document text
    • http://shopeuro.pro/advanced_dungeons_and_dragons_character_classeswbn2b.pdfIn PDF document text
    • http://bometaximom.scienceontheweb.net/lovezamebalerudixu.pdfIn PDF document text
    • http://hydra.moscow/verutisutifosuniwowufunky6kx.pdfIn PDF document text
    • http://prostosite.site/toyota_kluger_rear_seat_entertainment_system2mzkj.pdfIn PDF document text
    • http://dvigatel.guru/577055604779vu6k.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/libosokune/present_perfect_and_past_simple_worksheets.pdfIn PDF document text
    • http://popofisofol.myartsonline.com/eat_fit_meal_plan_bewertung_deutsch.pdfIn PDF document text
    • https://s3.amazonaws.com/mukutud/tepelaledonare.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/dibujo_de_una_cara_feliz_para_colorear.pdfIn PDF document text
    • http://bodirinukamole.onlinewebshop.net/wejajepozora.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_off00011551.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11551 5264 bytes
SHA-256: 6cf99f44f616523edab3a7dccab29888a731412d60f1d401047003f1e11f6a71
font_01_sfnt_off00012751.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12751 10672 bytes
SHA-256: 60cc04dcbe85ecdf0e8bc10865e349cffd14ac48b95e1f9e93110ebd688ae07b

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