Malicious PDF — malware analysis report

Static analysis result for SHA-256 60ca576145eae5f7…

MALICIOUS

PDF

104.3 KB Created: 2021-09-05 06:54:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 1311d099b5f70e534b221207e5a9223a SHA-1: 7646508193e702b0d9c43632e69631307e96ad7a SHA-256: 60ca576145eae5f7aeaa643b8205280a4eee29f922ffe2ed7b8808dd692cbf5d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by a machine learning classifier and ClamAV. It contains numerous external URLs, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users. The presence of embedded URLs and the overall structure indicate a phishing or malware distribution attempt, likely initiated via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://smidgel.ru/uplcv?utm_term=tangram+z+pdf+download PDF link annotation
    • http://brilspa.ro/userfiles/file///65389090025.pdfIn PDF document text
    • http://apexhealthnutrition.com/newerac2c/userfiles/file/64238822589.pdfIn PDF document text
    • http://amghanoi.com/images/ckeditor/files/69308465671.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/9bf99d4d908c4bb1aa0d78e465127e22/77247711725.pdfIn PDF document text
    • http://polletnv.be/uploads/files/4267200395.pdfIn PDF document text
    • https://maxflowfans.com/userfiles/file/vevuxokurepawalebeluvoma.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/b4lh645aj7ki80susogtum50ei/71897904193.pdfIn PDF document text
    • http://sahamit.net/userfiles/file/bajizojodozikeluzuvokeril.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/ubjg7d8arrlhkvbufvv6dtc643/sezemopotajovinukemuz.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ab9a4c655dd---rafolojipodudokenilagexuf.pdfIn PDF document text
    • http://chia4kids.ru/ckfinder/userfiles/files/somebolirigulasapiwekon.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/folawuli.pdfIn PDF document text
    • https://pasarantogel.com/contents//files/sazefosunolikofini.pdfIn PDF document text
    • http://qdjshg.com/files/file/selolobodubobatavebemogu.pdfIn PDF document text
    • http://precedent.by/_newsite/images_from_html_editor/file/wowefumojo.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/sclneab2e2hul2fijaen7rhn7s/57258657978.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b97e909d602---29520648729.pdfIn PDF document text
    • http://dietmoiquangle.com/webroot/img/files/93266460657.pdfIn PDF document text
    • https://dursunguney.com/userfiles/files/4544127666.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612bec165cff9---saketi.pdfIn PDF document text
    • http://samnakthodrahassob.com/userfiles/file/kipeluvitexugukokorawim.pdfIn PDF document text
    • http://sz-nuoyi.com/Upload/file/2021080310590350318.pdfIn PDF document text
    • http://xn--42-6kcdlkbomh7beggito5p.xn--p1ai/userfiles/file/89862733966.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_off00013038.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13038 19588 bytes
SHA-256: d776b474b6e98a1b094a0d5dca7ad3faaa986938f4a64e0019181086a534a869
font_01_sfnt_off00016378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16378 10460 bytes
SHA-256: 50e16c27f7925ff2d165525cf74f069992cf981685501b3c65c6f7e772a9f828
font_02_sfnt_off00017b09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17B09 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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