Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbe0b6e342158349…

MALICIOUS

PDF

89.4 KB Created: 2021-06-27 18:43:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 3731682ab945cfbfc6de2ce70f48c027 SHA-1: 9505f933c963b7c8c643588e7144c4bf0c6e5605 SHA-256: bbe0b6e3421583491c1f2763e720d9ad1d93dbd614236d9c9d74c16f0b114f1f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to websites hosted on compromised WordPress installations, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 https://nomylo.ru/uplcv?utm_term=the+fish+plaice+cleveleys PDF link annotation
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086d5e730dff---roritubesos.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/7dfcf3572e9c01a2f6a60b8cd8d5fa98/bodumebabizejagajiwev.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9ffca307d---42788214164.pdfIn PDF document text
    • http://myucmas.com/userfiles/file/xagatinololewibulewev.pdfIn PDF document text
    • http://anhuicrew.com/upload_fck/file/2021-5-21/20210521001205723463.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075c59a6f88e---60320767363.pdfIn PDF document text
    • https://rivaflo-south.in/userfiles/files/91990545658.pdfIn PDF document text
    • http://gerocuki.hu/user/file/15303858115.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/jo5gcsnlid58cujhhnmds4gfu4/tukisop.pdfIn PDF document text
    • https://podereilmontaleo.it/writable/public/userfiles/file/bagin.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7873517c91---jevuxirozikoxi.pdfIn PDF document text
    • http://i-dron.cz/data/file/jerupemirujebomotida.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160bdc87b9056b---serisubapidigeva.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb0a3732b6---dukudalodojigamipesolor.pdfIn PDF document text
    • https://travelsafeway.com/userfiles/file/70639883933.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080d0d40729d---xevebinegewipakobusibo.pdfIn PDF document text
    • https://iguanapools.com.au/wp-content/plugins/super-forms/uploads/php/files/5ltbi068bjtoajlceiba0oght5/73961641458.pdfIn PDF document text
    • http://tropo-design.com/ckfinder/userfiles/files/92468255938.pdfIn PDF document text
    • http://goteneplast.se/files/images/file/dizofumuvipobilim.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16079c4f36ef56---biliwakugupojadag.pdfIn PDF document text
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/959702a6e986c1094d6cb418fa892675/febezifowixuxevelokegi.pdfIn PDF document text
    • http://drairtools.com/ckfinder/userfiles/files/datetobolibajeku.pdfIn PDF document text
    • https://finances-canada.com/wp-content/plugins/super-forms/uploads/php/files/7d0e53fed4e40ba3b64a40c539b6edc2/94369683954.pdfIn PDF document text
    • http://newabel.com/ckfinder/userfiles/files/49791821042.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_off0000fc08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC08 10300 bytes
SHA-256: fc7eed715783df8798871ed4b0f950266d6383c7fd248dcc824542efc0ae167a
font_01_sfnt_off00011365.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11365 17176 bytes
SHA-256: f8a41db37a8a4dfb937b9c56b405626c7ab678d350a6377762320e34d33be6cf
font_02_sfnt_off0001402c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1402C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1