Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd13257ff1c99f99…

MALICIOUS

PDF

90.9 KB Created: 2021-08-07 18:21:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: d7aa0f96965c3a0534d8ec24f903952b SHA-1: dfbcf7e5feeaff51ad6593c01735a4f935937b71 SHA-256: fd13257ff1c99f99ca32e56838adf9ab083b0be811313557abb67f28cff8ad43
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ClamAV as a phishing trojan. It contains embedded JavaScript and a link farm that points to multiple distinct hosts, including compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious content. The primary purpose appears to be phishing or malware distribution through these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9876

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://lescourailleurs.com/upload/editor/file/60937282531.pdf In PDF document text
    • http://stepsforstarlight.ca/clients/c/c6/c668404594a1c08d975ab50c7bec58f6/File/zojuzapoliziz.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f64107c3ab---74612392472.pdfIn PDF document text
    • http://orchid-daikanyama.com/userfiles/file/wovutawovag.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607b02f45d022---tubalapazugufatigogagovot.pdfIn PDF document text
    • http://argol-editions.fr/userfiles/file/56589292076.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/lerptrf7oushh88acdo69rpciq/23542366970.pdfIn PDF document text
    • http://rw-hse-businessconsulting.de/userfiles/file/bevadojiwajekuwoxibe.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e1060416406---35995012335.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608e6ec29ae63---47511918918.pdfIn PDF document text
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/75a1d1d1aa7ffc4ce3d0477c32914cd2/texepogadaboluxed.pdfIn PDF document text
    • http://goldmustang.com/files/files/memepetoxagazolexavapiri.pdfIn PDF document text
    • https://corumosmanlimakina.com/js/ckfinder/userfiles/files/buxab.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/6ab7e1559709faab30043e33212844f0/63414152576.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/16086b42d0ec6e---25444061576.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/hiqhatt69e72pe4s87dfgm7qv1/39604023666.pdfIn PDF document text
    • https://marjoyunlar.com/calisma2/files/uploads/30336039806.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607b03df0eaee---37127686924.pdfIn PDF document text
    • http://bjzjygj.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/webuwefirum.pdfIn PDF document text
    • https://www.ebenisterie-burette.com/ckfinder/userfiles/files/37272183652.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dfe2305bef---pidajeleluroturudugitog.pdfIn PDF document text
    • http://americanpetrochemicals.com/customers/CMS-IMAGES/file/wizisololik.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c97480393c8---5023597013.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/9to3q728ot13ecst4n2rq6hca2/rowisakizorarefep.pdfIn PDF document text
    • http://servmed.net/userfiles/file/22792695760.pdfIn PDF document text
    • http://dd-eng.com/files/files/wuxas.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+turn+on+bop+it+extremePDF 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_off0000ff9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF9A 10456 bytes
SHA-256: 9386d1b0b0ca165d933bff71bec8d4938fafdd9cecbb0dce8b3217d11d02c8c1
font_01_sfnt_off0001170e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1170E 17284 bytes
SHA-256: 0231913f8e9f411e72a3fad895912cd21d7a45be3b4b41fadca6cb3eb19b9e9a
font_02_sfnt_off0001446f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1446F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1