Malicious PDF — malware analysis report

Static analysis result for SHA-256 989bd7d851e8d770…

MALICIOUS

PDF

78.4 KB Created: 2021-03-12 02:21:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 38019bd17fddde4f5256ff60c2082c2d SHA-1: 9ca675b8749b0a3b6490924888d3cfe7ad3a2839 SHA-256: 989bd7d851e8d77056c7c269833780e237ac8a31b2cd7ed9efdb9deef94de3ef
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 0.9992

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://nipisod.ru/award?keyword=learn+english+grammar+tenses+in+urdu+pdf PDF link annotation
    • https://cdn.sqhk.co/pirujezexod/cXoifgh/16353717864.pdfIn PDF document text
    • https://cdn.sqhk.co/rinilafexowi/SZhejgf/open_puzzle_box_game_mod_apk.pdfIn PDF document text
    • http://avit0.cc/handwriting_sheets_for_2nd_grade9wyft.pdfIn PDF document text
    • http://megidexabaror.mywebcommunity.org/aday_retmen_alma_kitab.pdfIn PDF document text
    • https://cdn.sqhk.co/viwiratoposu/aGg5ajd/bike_rider_mobile_racing_duels_highway_traffic.pdfIn PDF document text
    • http://tb-films.ru/jiroviwuvesawubakot3blzu.pdfIn PDF document text
    • http://idealslim-italiaofficial.site/72506894911s0uft.pdfIn PDF document text
    • http://xuxijosut.sportsontheweb.net/bokojefezoboza.pdfIn PDF document text
    • http://befotuke.mywebcommunity.org/midas_touch_book.pdfIn PDF document text
    • http://alsamcctv.com/how_to_determine_the_reliability_of_a_research_instrumentdwg1c.pdfIn PDF document text
    • http://didazema.mypressonline.com/vonololuwitulefosar.pdfIn PDF document text
    • https://cdn.sqhk.co/wugotiparo/vgcyZs0/world_robot_boxing_2_mod_apk_android_1.pdfIn PDF document text
    • http://trynon.xyz/38635561362vdk6p.pdfIn PDF document text
    • http://kefudepoduwudi.sportsontheweb.net/nkjv_large_print_ultrathin_reference_bible_genuine_leather.pdfIn PDF document text
    • http://sufofure.mywebcommunity.org/ancient_alexandria.pdfIn PDF document text
    • http://fagumawegoleleb.mypressonline.com/81015007142.pdfIn PDF document text
    • https://cdn.sqhk.co/gizukakom/hiehcih/wasefosedun.pdfIn PDF document text
    • http://italia-doc.fun/jimunagetozulotalosavc8l6r.pdfIn PDF document text
    • http://shop-you.xyz/61976709446u8qfb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e17f810-2436-4ae6-9992-ada77df11546/strategic_management_concepts_competitiveness_and_globalization_13th_edition.pdfIn PDF document text
    • http://jajogagek.atwebpages.com/2006_can_am_outlander_800_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f3efa84-9926-4b8e-8819-1918b5ea335a/93254602714.pdfIn PDF document text
    • http://jujobope.atwebpages.com/artist_management_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a128c045-3b68-42fe-94e9-77cd5cbe2173/dijubodup.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_off0000f66d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF66D 5396 bytes
SHA-256: 4e4cfc6162d71361fc0590e6f8a09b3efb0c067117f1a3b6434e0495bee64c97
font_01_sfnt_off0001089f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1089F 10444 bytes
SHA-256: bb0fbb8413461a2f03243c8e0639624eca93fc7e677df2c56f436c1b12693b5d

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