Malicious PDF — malware analysis report

Static analysis result for SHA-256 644c294d3e4f73c1…

MALICIOUS

PDF

92.8 KB Created: 2021-07-20 23:43:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 1af235b7fed9752e562ca198a8f63625 SHA-1: 21c1986ae3445fbfaa2cf2ffe515004a32db4e21 SHA-256: 644c294d3e4f73c1fc05e55365c8fdd27737060eb990c43db86059f3f8f3aacd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to PDF files hosted on compromised CMS upload directories or disposable hosting. This suggests a phishing or malware distribution campaign where the document acts as a lure to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://qunjl.com/userfiles/files/408415442.pdf In PDF document text
    • http://ketoanaca.com/uploads/image/files/sajogev.pdfIn PDF document text
    • http://ekolojikweb.net/upld/userfiles/file/11996444730.pdfIn PDF document text
    • http://ottotech.center/userfiles/file/28726700724.pdfIn PDF document text
    • https://faresaldabbous.com/uploads/files/mitan.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b344be4e49e---79358227901.pdfIn PDF document text
    • http://aj-logistics.com/stock/userfiles/file/60312303677.pdfIn PDF document text
    • http://aimic.com/userfiles/file/39338392893.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/fff54bb0e24dcc4160b481441c24ba5f/pefisifuj.pdfIn PDF document text
    • https://medsplus.us/admin/images/file/nuwogimodeniwoxulogulapo.pdfIn PDF document text
    • http://gayaarchi.com/userfiles/file/20210521091150.pdfIn PDF document text
    • http://sanmarinreunion.com/clients/c/c0/c0747301521b2fcd71a0106c9132c7e7/File/dunav.pdfIn PDF document text
    • http://kaushalacademy.org/ckfinder/userfiles/files/84122144309.pdfIn PDF document text
    • https://sharadsangam.org/UserFilesTwo/file/felos.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/b18ii7jhlq2ep8cn2uuoe8ojal/78779819302.pdfIn PDF document text
    • http://globalquestconsulting.com/userfiles/files/latuxidiba.pdfIn PDF document text
    • http://drwatsonsr.com/clients/2/2b/2b9a0cf27321ceab3a47fbd10bf94d34/File/20906783156.pdfIn PDF document text
    • https://dermatologie-francophone.com/userfiles/file/kipibitanoxo.pdfIn PDF document text
    • http://motivationandmomentum.net/ci/userfiles/files/mafatuguwix.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608323b7618ea---tanotivajof.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16088a550a3932---jupivukedokaxojudifu.pdfIn PDF document text
    • https://netcsemege.hu/ckfinder/userfiles/files/34336337030.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb51eae600c---3293973063.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/ivs1bvidgakor065rf4orlobe6/rirejabidafa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=ethical+responsibilities+meaningPDF link annotation
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e22a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE22A 8052 bytes
SHA-256: 2a100f54b522bb0a6818cfa43a0248db6908f8c3b22e16b11e7cbac9e9f83c32
font_01_sfnt_off0000fd3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD3C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011553.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11553 10944 bytes
SHA-256: 7fb5eab8e5805f070abe5aa0e4213a825215bc9510c88d0d8007aeb344b2de78
font_03_sfnt_off00012e3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E3C 20308 bytes
SHA-256: 84a60700dac965998187afca6d7ce65ece1b3f6dca043614c9fc02abbae8fce6

Open this report in the interactive analyzer, or submit your own file for analysis.