Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c4a66719b6163ec…

MALICIOUS

PDF

77.8 KB Created: 2021-02-24 13:47:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 78954eae5a59c85003e0378ec92cb788 SHA-1: 0840915e756c73a2a5d12c5fdf7ac5c63f9c9fb4 SHA-256: 7c4a66719b6163eca8bf11a433d6209ba466f60021523a7f5229ac074c3da5b4
176 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a phishing or trojan threat. It contains an image lure with an invisible link to the domain 'securitycheckingbrowservkcom.xyz', which is suspicious. The presence of external URIs and the overall detection suggest an attempt to trick the user into downloading a malicious file or visiting a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://maypoin.ru/strik?utm_term=brother+hl+2240+replace+toner+cartridge PDF link annotation
    • https://melekutiruj.weebly.com/uploads/1/3/2/7/132740408/ganuzil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393356/normal_6031e2b5182f2.pdfIn PDF document text
    • http://securitycheckingbrowservkcom.xyz/android_republic_dokkan_battleyn9cw.pdfIn PDF document text
    • http://podcard2020.site/sas_ods_excel_format_number9snvn.pdfIn PDF document text
    • https://cdn.sqhk.co/benibavagoge/gihjYjd/find_skype_users_online_chat.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459623/normal_60025b2e0764c.pdfIn PDF document text
    • https://cdn.sqhk.co/wesebewoweva/HjfjbZ8/43798195175.pdfIn PDF document text
    • https://viwoseloza.weebly.com/uploads/1/3/4/8/134861971/rurukoramesovim.pdfIn PDF document text
    • https://tapituxupali.weebly.com/uploads/1/3/1/3/131382330/521787.pdfIn PDF document text
    • http://bit-ipo.ru/how_do_i_reset_my_jbl_sb400_soundbarv6noj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388407/normal_600ece5f9f5a0.pdfIn PDF document text
    • https://cdn.sqhk.co/venifirub/dwicijV/reversi_free_math_games.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/papuja/vodepagimomajozozilodod.pdfIn PDF document text
    • https://s3.amazonaws.com/netinuwa/follow_up_email_after_resume_submission_template.pdfIn PDF document text
    • https://s3.amazonaws.com/jexijer/bewijijiriwofi.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/c_est_la_vie_song_pagalworld.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_off0000ddb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDB8 5568 bytes
SHA-256: 263fb0de4b6618e0ccc0f948b4fbc9997895801094a1eeb6e42b9b97dfe99ad0
font_01_sfnt_off0000f0a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A7 10600 bytes
SHA-256: 0d5888f7e61cab9513d33694f9fed760e14e28c0e588bca0060ccf397b3b8750
font_02_sfnt_off000114b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114B9 16092 bytes
SHA-256: 2c5f1a2e3d9f683f6a217a47aeaaae813f7d4ef732a5ff54a929695507d09140

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