Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d442836fa4c7373…

MALICIOUS

PDF

93.6 KB Created: 2021-07-16 13:44:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: eb2adf08bd9543ddde682993ab3ffa7a SHA-1: 2e23be087e5e64729098227c30e5237a16e73e1e SHA-256: 2d442836fa4c73735accc1c1b45924b993c73caa2a8fff6ad9c3588f0ae96059
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links pointing to various websites, many of which are hosted on compromised WordPress installations. The ML classifier and ClamAV strongly indicate maliciousness, classifying it as a phishing trojan. The presence of numerous external URIs and link farms suggests an attempt to direct users to potentially harmful content, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160d6578b52510---jaxosum.pdf In PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16074ad2ad27f2---22827865061.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/emg1fgq3uu2dj4rj0ohtujvcnr/765814221.pdfIn PDF document text
    • http://angelojrobles.com/admin_initial_test/userfiles/file/welit.pdfIn PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/df60sf2khimqn3nees7l9d7kj7/30149970761.pdfIn PDF document text
    • http://antifftech.com/uploadfile/file///2021062522474114.pdfIn PDF document text
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/34685b8c614d30b41efad0309e7a310a/tomegimevuwen.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/16aa6c519445e150031884e30276a31a/17763158278.pdfIn PDF document text
    • http://opakowania-loga.pl/zdjecia/fotki/file/bapufeketepoxunanatig.pdfIn PDF document text
    • http://xn--e1aaafipco3bk8gra3b.xn--p1ai/upload_picture/file/rixejobavadebaxogamuja.pdfIn PDF document text
    • https://daaeportrett.no/upload/file/16974192379.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160702275cfa04---rulowijunobetifeninokuzaf.pdfIn PDF document text
    • http://ritadas.in/userfiles/file/voferakozixuxikewewejujax.pdfIn PDF document text
    • https://betalinktech.com/blmedia/file/57547894971.pdfIn PDF document text
    • http://iswii.net/ckfinder/userfiles/files/16669940915.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/41c5nuffsce8h7p0d6kk1pgt46/95818330870.pdfIn PDF document text
    • https://clumba-indoor.ru/files/files/84070628901.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/fbf39eca257d94d35f13631468740129/butak.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/49d89520b74db30d5cf0a2484e694e8d/tuwijudawexalepab.pdfIn PDF document text
    • http://tano-cable.com/d/files/62027727072.pdfIn PDF document text
    • http://gostinica-domodedovo.ru/files/pilabemizulafirule.pdfIn PDF document text
    • http://heizler.hu/files/file/97883192516.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a9a52192381---masabumifebewev.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/73661435471.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/55671323047.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=directive+principles+of+state+policy+meansPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010b70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B70 16936 bytes
SHA-256: f92adc68024717ab024d8ae84e9568d8a33a7347417d4274e738fe32a643e523
font_01_sfnt_off000137cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014fe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FE3 10824 bytes
SHA-256: 169b263ac3bda70b4a5d8ba1279b7aa17622844e3aab1b253d5ee8efecff0192