Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f6134fc9c8f6bae…

MALICIOUS

PDF

86.1 KB Created: 2021-09-17 12:06:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 87ab54573c18f0d835e1f5d87a961919 SHA-1: 77d58a41d700b9ca36f6b99b50830d39e861bc20 SHA-256: 9f6134fc9c8f6bae1c797d4fecb7284f946000b133440f130d34e4a737f14ff5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external links, including one pointing to a raw IP address, suggesting an attempt to redirect the user to a malicious download site. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://mogilew.ru/userfiles/file/tarinukuvuzuluxakuxemamuz.pdf In PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/f45dc8dfb05aba4b6b2da5ac55b90126/68949734279.pdfIn PDF document text
    • http://tilestone-pools.com/i/File/jezedasonarizus.pdfIn PDF document text
    • https://408of53crownstreet.com/assets/media/files/37811775367.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140a3208dd22---79301617056.pdfPDF link annotation
    • http://robvancampen.nl/userfiles/file/85420243730.pdfIn PDF document text
    • http://linpus.com/app/webroot/userfiles/files/zumizozatinileda.pdfIn PDF document text
    • https://feldmann-spedition.de/pics/userfiles/file/33444723676.pdfIn PDF document text
    • http://mydreamtuscanwedding.com/editor_up/94055487863.pdfIn PDF document text
    • https://bestrecycledautoparts.net/images_i/file/jusosigubet.pdfIn PDF document text
    • http://holzbau-napetschnig.at/59339307928.pdfIn PDF document text
    • http://e68momo.com/shopadmin/upload/files/35428387637.pdfIn PDF document text
    • https://horkolas-gatlas.hu/ufiles/file/25394118956.pdfIn PDF document text
    • http://motolargo.pl/userfiles/file/bepugi.pdfIn PDF document text
    • http://edallyshop.com/upload/files/xamerogunesobizobopetuwe.pdfIn PDF document text
    • https://maintogelonline.bet/contents/files/64002393992.pdfIn PDF document text
    • https://songiadahoaian.com/upload/ck/files/93034703843.pdfIn PDF document text
    • http://psycare-spb.com/userfiles/file/58159692836.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/ee532cf01ed1deee48ad840308f3b6b4/40119941980.pdfIn PDF document text
    • https://ist-lb1.istanajp.com/contents/files/48768979176.pdfIn PDF document text
    • http://amindoost.ir/images/upload/files/84872757176.pdfIn PDF document text
    • https://amd-export.com/site/upload/file/40871393915.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=the+ultimate+husband+novel+free+downloadPDF link annotation
    • http://elezioni2014.gds.it/userfiles/file/85605223369.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA63 18040 bytes
SHA-256: 1688bc7b11a14c74f9be1de5d3024aec37b6b7f98a3c7dd9c99250b515beeb3b
font_01_sfnt_off00011968.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11968 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001317f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1317F 10976 bytes
SHA-256: 18c30024b3c13ef826dd58f5f21b72cc34a04c1a12e8c422483deef2837c6b29