Malicious PDF — malware analysis report

Static analysis result for SHA-256 48e65f2bf762f8c2…

MALICIOUS

PDF

87.4 KB Created: 2021-06-30 00:17:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 5d518f24678e5b41514a0c4a08ea92fe SHA-1: 51886beb6e712dea925a8e195d83f72d1632a877 SHA-256: 48e65f2bf762f8c28fe689fe892220e0259dbcfb982628e1c38ce396844b4099
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The PDF's structure and embedded URLs indicate it is likely part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cae3c16c3f---vevufunuluruxul.pdf In PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/a9dcf1268d588b39151d4fa8e4c1d6b2/suwawenuvokagivupejuliv.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d2a642bb07---43111233844.pdfIn PDF document text
    • http://rrbrentacars.com/files/others/vejurijatutuwupomomusub.pdfIn PDF document text
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/iorvv5kn0ob24uvsk4dp3k34gn/80045004459.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/s45iprb4gojjo6rl9gn9cti5v2/wujobazironupigu.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c147d5b9c15---wakomom.pdfIn PDF document text
    • http://hacoauto.vn/upload/files/46897582121.pdfIn PDF document text
    • http://biurod9.pl/public/userfiles/file/wetakodozokurijikuw.pdfIn PDF document text
    • http://bahattinburyan.com/userfiles/file/93274165322.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/ce59697872f3c4ef2cff2dad262dc462/nimubizunisigawijexofaf.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/07fbaba7f47ac98a3cb011124867790b/13110772374.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/c52a149b977ad9f8802f17073701a5a8/92310466279.pdfIn PDF document text
    • https://nestaerospace.com/uploads/file/69820944903.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160837fa18fe71---84468811965.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/qe378qbmua62355c7q0fhtr3io/75413867505.pdfIn PDF document text
    • http://veterina-hrib.cz/user-uploads/files/42281778411.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/skogpah0g76rvk70bruv0pvoi0/89749612894.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/dcaaca7a3163677669393013ff8693e0/mimow.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/2g2nk7ul3cdjs3cqu5idptfj9e/12658048213.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/bbcd5f1e5aed29f132ed449a43040c26/dexakufoxa.pdfIn PDF document text
    • http://sharise.net/Uploadfiles/files/foxal.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607618e832233---livogogaruminiru.pdfIn PDF document text
    • https://gyandeepjkss.org/userfiles/file/xisela.pdfIn PDF document text
    • http://szwygs.com/upload/24989305903.pdfIn PDF document text
    • https://people11people.gr/uploads/File/40549411194.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=how+much+coffee+per+cup+in+percolatorPDF 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_off0000f534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF534 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010d46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D46 16316 bytes
SHA-256: 513bd27456fd967f96ac7441e3706629ae4f895f5191e0e98195fd9c312be6d9
font_02_sfnt_off0001374b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1374B 10756 bytes
SHA-256: 510eaf4985e2b6d0b09f22dd22bc40d1467d532040cf28668f1efeada0689343