Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a6ad2f47857e06b…

MALICIOUS

PDF

96.0 KB Created: 2021-06-25 22:58:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 3745264e49acc94599eb80cf49b28904 SHA-1: 3469dbbde54a7d3eab9d77a1c7653887459afc9c SHA-256: 1a6ad2f47857e06bda512e75a4efcdb84ca1e2c29d8e16a8c080cff4344cfd60
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or malware distribution lure. It functions as a link farm, with numerous embedded URLs pointing to various websites, some of which are hosted on compromised CMS uploads or disposable domains. The presence of these links suggests an attempt to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://nomylo.ru/uplcv?utm_term=gold+earring+red+dead+redemption+2 PDF link annotation
    • http://hitecds.com/userfiles/file/22592031044.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/d44dfbd7874ffda940aa03ec3c2fd47f/pebeliv.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160a6845939892---44122024136.pdfIn PDF document text
    • http://atthaya.com/file_media/file_image/file/niwapen.pdfIn PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/4oboq6ij7n4g3cuaklus6rf6nc/91312104102.pdfIn PDF document text
    • http://infrabud.eu/fckpliki/file/jasugaginikazefarabozewa.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/e602d21f9facad8f6b24ff8af63b1638/93169819009.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079fd3e67f03---19062187774.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/ie021o9u6c61cdbfq3c1cpjrj5/50065520556.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/85514750286.pdfIn PDF document text
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/b6975f63f683864e81ac23b1eeb076c2/55818567375.pdfIn PDF document text
    • http://alacarte-design.de/userfiles/file/jumaxajakewo.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/c08c19ne73n4b99gdf6af4eivj/64211912425.pdfIn PDF document text
    • https://kham.vn/userfiles/file/2367825626.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ebc819f145---76241584814.pdfIn PDF document text
    • http://caratow.eu/userfiles/file/83660218989.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/fdauegfp60gdqo897q8npmr754/53952740046.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16086bc5cb800f---jofemef.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160a8b3498dde7---rakunizijijap.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-6-15/20210615024505614342.pdfIn PDF document text
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/39847b828d37dfc67eb481a7955bf984/leluxovivurumijoxes.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/859c7893daee308d9b744e8c9aae015c/38780224645.pdfIn PDF document text
    • http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/gulonogivawa.pdfIn PDF document text
    • http://chinalanpa.com/images/upload/File/13165927335.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_off00011522.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11522 17416 bytes
SHA-256: c54b711ca0a61ba3edea6cfa129bbbb98510a8d267293db1e4e3e4529da982df
font_01_sfnt_off0001422c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1422C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015a43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A43 10728 bytes
SHA-256: 2f9a9d2eb08e74e082d39a35a0701c2b007dd17b32b2e18217604229522a1189

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