Malicious PDF — malware analysis report

Static analysis result for SHA-256 71cb5ebdb8b1a61a…

MALICIOUS

PDF

79.8 KB Created: 2021-01-31 21:17:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 9d4051e00e87d1828cf908dd6f68b7ea SHA-1: 38d8e55018140f6227c717512a04f2ca48185a29 SHA-256: 71cb5ebdb8b1a61aa0ac4f8f590814aea9408c2776d1511c6e4596147d344755
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.9998

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/aws?utm_term=jio+cinema+mod+apk+2018 PDF link annotation
    • https://pazopoxe.weebly.com/uploads/1/3/5/2/135293382/dekabev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485718/normal_5fda3aec80586.pdfIn PDF document text
    • https://nezubarenegutel.weebly.com/uploads/1/3/0/7/130776328/gawedaro.pdfIn PDF document text
    • https://bifukumuvu.weebly.com/uploads/1/3/5/3/135347201/wetamodulog.pdfIn PDF document text
    • http://letxxnx.org/under_seat_subwoofer_box_silverado5c89h.pdfIn PDF document text
    • http://shopsupergood.site/free_autism_stuff_2020_uk8yja6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390664/normal_5fe12418406f7.pdfIn PDF document text
    • http://momentshop.space/29856204409s60ou.pdfIn PDF document text
    • http://help-copyrightservice.xyz/vajuwavatufejimi26mb2.pdfIn PDF document text
    • http://dnepr24.info/playerpro_music_player_apk_2020v7cqx.pdfIn PDF document text
    • https://cdn.sqhk.co/bapulofuw/dodhfZx/epic_boss_fighter_unblocked_games.pdfIn PDF document text
    • https://firerokuk.weebly.com/uploads/1/3/1/1/131164187/zibefu.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/pegozegi/gavixafiru.pdfIn PDF document text
    • https://s3.amazonaws.com/pipaneku/ridimebe.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/suxurufegepun.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/59575303252.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e282.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE282 5488 bytes
SHA-256: f1ddc0f4b5fbef9cc1134b9a8cb933340b32e5a773b9e79dbb143067c7658c13
font_01_sfnt_off0000f527.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF527 11060 bytes
SHA-256: 050571b82f3c5d54c33562e5dc34f95db396b93af73edb0e1744a3a1f731cc4b
font_02_sfnt_off00011a76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A76 16756 bytes
SHA-256: 2660e3f19262e0c1c514f7a0045fa503cee1831b49ccf21a997877b0058606e8

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