Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e136de59edb9de6…

MALICIOUS

PDF

72.9 KB Created: 2021-09-07 20:15:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: fba1944611f9a1e95e6f8a59bdbd2469 SHA-1: 0260cefbcb7a4ff0bd8c1f0c1c6447dbb98d0bfd SHA-256: 1e136de59edb9de66803edf5077b7cd39ede6db87de129b0f55aa8293a846d7e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains a link farm pointing to numerous URLs, many hosted on compromised WordPress sites or disposable domains, suggesting a phishing or scam campaign. No scripts were extracted, but the presence of numerous external URIs indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://queure.ru/uplcv?utm_term=physiotherapy+for+scoliosis+pdf PDF link annotation
    • http://shortguycentral.com/ck_uploads/files/zutuk.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/47dd99f5a85d65584ac1da6bec406f98/kelenadi.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160bf92fb57398---rodereroli.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/tnpksrh9r6ul5g35e9q0mdv894/lakatax.pdfIn PDF document text
    • http://otoozevran.com/resimler/files/47245712080.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1612b44ffc7c77---luvabiteg.pdfIn PDF document text
    • https://www.deuba.info/wp-content/plugins/super-forms/uploads/php/files/p5pmmc3ua3b51vb9pu2d6renpr/pazamazakobobo.pdfIn PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/0d0351dbbaec2d28bf77d3ab15647d2d/luwozugowike.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/mezabitedixivu.pdfIn PDF document text
    • http://studiogalata.it/userfiles/files/60068969495.pdfIn PDF document text
    • http://urbanconstructions.org/images/uploadedimages/file/34127852215.pdfIn PDF document text
    • http://www.jobsincrete.gr/images/_user_na/file/womaxasivelobaxeposedudem.pdfIn PDF document text
    • http://tuanayapim.com/rsm/files/pemivogix.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16116460b5d1ed---jovinopokabejigakobibus.pdfIn PDF document text
    • https://morabia.fi/images/file/47269199549.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a09a308c35---55158346024.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1ac6b41e8---25158752951.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160704c79b0d89---46305165810.pdfIn PDF document text
    • http://bsl-trans.ru/admin/ckfinder/userfiles/files/43400364598.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/1cfb13104c88b0c362eeb046c5ce3dd5/39759350815.pdfIn PDF document text
    • http://stylekd.ru/files/86251919359.pdfIn PDF document text
    • http://robinsonfamilyreunion2021.com/clients/7/77/7769cd5c98d63cfb9738ae2db1c5c42c/File/ritajiveminimulazu.pdfIn PDF document text
    • http://sellmysayarah.com/userfiles/files/13147492424.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_off0000bd11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD11 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d528.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD528 10728 bytes
SHA-256: 02b3d03efc6ff32019e9004dd2ae00307c658683ba2aae154ddc1dacf7a4f05f
font_02_sfnt_off0000edf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF9 15888 bytes
SHA-256: cca89abd9a0c5f6c66aa1f44c65e3e7031109909ee0b8adaec5bf30e2b3a3062

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