Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dc76faeab3a93bc…

MALICIOUS

PDF

83.0 KB Created: 2021-03-19 13:42:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7d5feedf297d196c25d7fe6405b6b3b9 SHA-1: 5a271ef0ec18f7d1e3d3aadc506196cf2bb47679 SHA-256: 3dc76faeab3a93bcfc59d0947cb5427b37f4dd0d0e61d6eeca358f4e7c70788f
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 0.9997

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://crophysi.ru/wix?keyword=showbox+apk+4.93+download+for+laptop PDF link annotation
    • https://rikelakejif.weebly.com/uploads/1/3/4/8/134885243/2130322.pdfIn PDF document text
    • https://cdn.sqhk.co/xusopusavo/jh2gcij/josuzutovotamidusowoxe.pdfIn PDF document text
    • https://cdn.sqhk.co/xaselavub/aiihbgd/29243330078.pdfIn PDF document text
    • https://cdn.sqhk.co/numokafas/eheZgcJ/sinuwezazuxomasesemag.pdfIn PDF document text
    • http://dkblogin-de.best/78878765920th4o7.pdfIn PDF document text
    • https://sidilatadafexu.weebly.com/uploads/1/3/1/1/131164021/3643744.pdfIn PDF document text
    • http://mesretly.xyz/4598484273l1pm0.pdfIn PDF document text
    • http://idealslimitaly.site/858579407813an1s.pdfIn PDF document text
    • http://eurozone.pro/sony_fm_am_clock_radio_icf-c11ip_manual9c1r3.pdfIn PDF document text
    • https://gamevuwi.weebly.com/uploads/1/3/4/5/134525912/sisosabavowolux.pdfIn PDF document text
    • https://zomurudol.weebly.com/uploads/1/3/4/4/134492975/selezugekefixi-kaduzopil-sugimubem-jogikalaweled.pdfIn PDF document text
    • https://jimuvidagonolab.weebly.com/uploads/1/3/1/6/131636746/2670312.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/2e48c5c5-40fc-4e80-8d18-c07d5713d3ff/zelakogigo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c6dd66a-fbb8-4220-9e82-810e19ce05b1/bovotajufaxeregib.pdfIn PDF document text
    • http://bewebumaxof.epizy.com/android_game_mod_site.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8de430f-4722-46d2-aaa6-750ee0b3e1d8/79433806260.pdfIn PDF document text
    • https://s3.amazonaws.com/bufipevuril/xiriboji.pdfIn PDF document text
    • https://s3.amazonaws.com/wokesabisevo/husqvarna_sewing_machine_repair_shops_near_me.pdfIn PDF document text
    • http://mudozegiviw.epizy.com/why_we_sing_kirk_franklin_mp3_download.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/zubuxifovutefopakuzufipe.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_off00010467.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10467 5856 bytes
SHA-256: a61c115c4cf116c16e09bd5694828b33c51ff137ce89c289242ce2f61dddc29d
font_01_sfnt_off00011872.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11872 11156 bytes
SHA-256: 4915e64176a949864814da7af29459a9d6560b55d762f173d75e09a5f8d8b20a

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