Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed8172481171e40b…

MALICIOUS

PDF

86.4 KB Created: 2021-08-16 21:19:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 7d0820aede0856a56c5271f782c91df2 SHA-1: b7b033f0df85c9dd9d19ea3d08afaa2a27a05f52 SHA-256: ed8172481171e40b2baa322ea7151110fe6ddf48bd0ac77eeb923d0d07160723
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to other PDF files hosted on various websites, many of which appear to be compromised. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of embedded URLs and the link farm structure suggest an attempt to lure users to malicious content.

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://infrive.ru/uplcv?utm_term=pokemon+soulsilver+randomizer+download PDF link annotation
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b977db5bb38---bemugolugipatevuzeworaxa.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/bafazaxelobuzozokodor.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/875gg2vf8r41gr3enlsvl11nso/nikelawadabezo.pdfIn PDF document text
    • http://www.zywawiara.pl/pliki/49199227183.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/2646e39d362eea072b3f20be272ed9c5/3769236686.pdfIn PDF document text
    • http://dorrstrechy.cz/UserFiles/File/ribazobilovowudanime.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b704c64d1---99539094623.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0d061c497---31357455626.pdfIn PDF document text
    • https://www.wroclawmodelshow.pl/ckfinder/userfiles/files/fifezolagafago.pdfIn PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/nluehq0lpvoq8g1usob31brqsn/dudiw.pdfIn PDF document text
    • http://urbanconstructions.org/images/uploadedimages/file/73900268116.pdfIn PDF document text
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/d41da0afb6a5d95c46aac9178a77b679/82827623686.pdfIn PDF document text
    • http://sambometal.com/dataroom/file/82604034680.pdfIn PDF document text
    • https://hbphoto.ca/resimler/files/55540454829.pdfIn PDF document text
    • https://xanbiente.de/userfiles/file/38001772553.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/e2967b6d427be06e2094882c94bd7034/75364129780.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/ldeecap2hm96ec0e7rapqvospq/21121589821.pdfIn PDF document text
    • https://healthmatters.me/userfiles/file/64245077249.pdfIn PDF document text
    • http://acpiindia.com/userfiles/file/satowuj.pdfIn PDF document text
    • http://aygroupmuh.com/image/files/72887129792.pdfIn PDF document text
    • http://antifftech.com/uploadfile/file///2021051914022458.pdfIn PDF document text
    • https://www.medicalbi.com/ckfinder/userfiles/files/82750679224.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/2de135f8f2909d3100ee990a267731d7/susibekow.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_off0000ec03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC03 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010415.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10415 17356 bytes
SHA-256: 0aa2a27543884bf28468df4a584eec3db4d6fa0e330d97d605a2bc6eca5d95c0
font_02_sfnt_off000131dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131DD 10716 bytes
SHA-256: 39f5772853b0d4197c9ec2a80ffe0025ae59398b1281addf5b382907764e4009

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