Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f60c6e03632c85f…

MALICIOUS

PDF

97.5 KB Created: 2021-06-29 01:35:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: c3bd9ff01fb21657bf30527ba0914059 SHA-1: 804566b4a54b57989283e90493b730f9956ec02b SHA-256: 2f60c6e03632c85f2d718f06ea696edb82c00f0ca64f329331e284e8b2d02c73
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicate a high probability of maliciousness. Multiple heuristics indicate the PDF acts as a link farm, directing users to numerous compromised WordPress sites and disposable hosting domains. These links likely serve as a lure for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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://laborke.ru/uplcv?utm_term=5+pm+cet+to+ist PDF link annotation
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/dh2vpsoprs630k1lfr5vbmjhbu/78925714122.pdfIn PDF document text
    • https://bouwservicewinthagen.nl/userfiles/image/file/94466713556.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609a2006ddad7---lufexipuzana.pdfIn PDF document text
    • https://alamansyria.com/userfiles/file/20406450301.pdfIn PDF document text
    • http://xn--9d0b102a6wc3y4a.com/sa_upload/userfiles/file/20210614141030.pdfIn PDF document text
    • http://hopkins1983.com/clients/861771/File/tonupusexasaraku.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2c39b7f661---tewij.pdfIn PDF document text
    • http://clearspace-design.com/CKEdit/upload/files/50329428574.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c08e33099bc---gutajakuzefubuxunalezoxij.pdfIn PDF document text
    • https://matrainagycsalados.hu/userfiles/file/48960097067.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/n5e8jqtr4qops0pnjf54n0rghs/66193601087.pdfIn PDF document text
    • http://csc-028.com/userfiles/file/20210629062140_d6kx31.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/af8533629327a2c0df9dff9ba787e88d/ketobujoripejamovu.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ace2cfa56ba---xigewevuxudifuxuzode.pdfIn PDF document text
    • http://bezagsecurity.cz/userfiles/60365321334.pdfIn PDF document text
    • http://bsp-oblspl.org/ckfinder/userfiles/files/54829235912.pdfIn PDF document text
    • https://absolut-fit-and-dance.de/wp-content/plugins/super-forms/uploads/php/files/81c9u1iteklibvmu1u49uh2deq/46519576503.pdfIn PDF document text
    • http://ags-sib.ru/ckfinder/userfiles/files/78300002165.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/35248263726.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/90522ad170437e12e7886c125c0c746a/xupeb.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a0e3f381601---xuvogotemobopeg.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/f1c48ef4e371777011dfa8d88a8a5e52/susovaf.pdfIn PDF document text
    • http://kennedy-jackson.com/clients/f/f7/f78508644b517540cdb1549d93860f53/File/73746007722.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_off0000f961.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF961 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011173.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11173 18456 bytes
SHA-256: af976da582e54943f65b3a8bcd26a8918695458ae5fb6a2577582f8422682575
font_02_sfnt_off00014059.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14059 10160 bytes
SHA-256: bc208cbaba902b91e87e90b48930debc475a45e3dfbd8f8074f73fc84b7158d0
font_03_sfnt_off00015717.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15717 10272 bytes
SHA-256: 7525b85bb28dd3cd3acb5ba5f11c9d392bebf1c23c540ae261da9f27d59c3ff9

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