Malicious PDF — malware analysis report

Static analysis result for SHA-256 0861f47b0a29c83d…

MALICIOUS

PDF

106.5 KB Created: 2021-07-15 18:43:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: bf2fda01e2beae28ef41e5c2f05fe6bc SHA-1: 2c7c4464d310a2c4086c9d5b3d75b7938adc66cc SHA-256: 0861f47b0a29c83d45ec951b7e14db14337aa0f337f3ea08ecbd435f1b5d8a83
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous external URIs and link farm patterns, indicating it is designed to redirect users to potentially malicious websites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. The presence of compromised CMS upload links further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9882

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://garglob.ru/uplcv?utm_term=lonely+planet+tuscany+pdf+download PDF link annotation
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/jblpkjlsj0u287tcc2kua1p802/mubofagitezesaninu.pdfIn PDF document text
    • http://bakoca.hu/files/file/vepixe.pdfIn PDF document text
    • https://shatalarab-llc.net/userfiles/files/jikezomurevuwosufovukafir.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/861c7132e034e8d32d76deee7ab952e0/sogefunabev.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/6jb6ckagnctmq0ivn507tjms5i/suzevupozi.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16072129697686---9658780106.pdfIn PDF document text
    • https://stalbeckers.nl/userfiles/image/file/kefagolexa.pdfIn PDF document text
    • https://podereilmontaleo.it/writable/public/userfiles/file/39775019991.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a42f481f4b4---85681321179.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1ad7141e13---22414216839.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/dt28vsfa5a9a1h7h5vpm4635u3/78381691048.pdfIn PDF document text
    • https://fibaquitaine.fr/cebatrama/userfiles/files/59239446349.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/951cc39c935566ebd2512c09c1c71c85/6781387224.pdfIn PDF document text
    • https://aodaixuan.vn/app/webroot/upload/image/files/gozikofadojekovabobe.pdfIn PDF document text
    • http://asijskepotraviny.cz/files/file/weputakavuw.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/n3j3c84m4ba20103e7ogb2gir5/17449672990.pdfIn PDF document text
    • https://aznamaste.com/ckfinder/userfiles/files/napuxojalanulu.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/xukesosomenokowuninowu.pdfIn PDF document text
    • http://casier-a-bouteilles.com/file/62087724055.pdfIn PDF document text
    • http://expresskaliski.info/file/8006724312.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607739180eb26---gejafazenadezajoditas.pdfIn PDF document text
    • https://sieuthigo.vn/upload/ck/files/nogobexepezeximukobo.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/01d23025b933a9ff1f7aaf3af19d5155/jajeroxomeromejewof.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012507.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12507 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013d14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D14 5712 bytes
SHA-256: f602c50c07c1dbe675aec2eb00c868bdeca777bc0632f6fad8dfd66a904a7eec
font_02_sfnt_off00015121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15121 10676 bytes
SHA-256: b97bbd40b384994029082f909698bcd3252bb49896133f76c2611f98eae3b24d
font_03_sfnt_off000169d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x169D8 20108 bytes
SHA-256: 195c80ad926c17ba076fd3514a693082117c7beb1e25b66e65abb0faf9171e5b