Malicious PDF — malware analysis report

Static analysis result for SHA-256 fedafca490df9ff2…

MALICIOUS

PDF

85.9 KB Created: 2021-09-01 06:58:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 5f33e665d32d9e7ff15bb084de88b988 SHA-1: 50f020776cadf235820e4383e997e6a37804f437 SHA-256: fedafca490df9ff297c16bf2a0782f880eafc4066f56fd71f88488d8e104213b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 http://pferdefreunde-brueckenhof.de/sites/default/files/userfiles/file/wevogukiwo.pdf In PDF document text
    • http://benhvienlaptop.biz/userfiles/file/guvawamudulaguvavejaf.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b3434835e25---bumokatozasixodujesavuke.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/4be574f1cec386698d5fc4a4652d67ea/52826715596.pdfIn PDF document text
    • http://wojno-stal.pl/pliki/file/sifabemelenokajavoj.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b729cdc06e1---91258981307.pdfIn PDF document text
    • http://nail-free.com/ckfinder/userfiles/files/solojidorudiraropujuseto.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161148cd25c987---jojuwuwotulovifamiz.pdfIn PDF document text
    • http://laweasy.kr/userfiles/file/nejumivuzapurini.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee5f0b7e68c---kudewonewesovu.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d5c3fc369a8---99161655247.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160c1d0bf910bc---57788628756.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609c89f1e5a48---xujirapa.pdfIn PDF document text
    • http://zonwering-belgie.be/ckfinder/userfiles/files/20571102551.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/jizefasozizuwifufufiwigu.pdfIn PDF document text
    • http://pereplanirovkaoblast.ru/pict/file/69560395157.pdfIn PDF document text
    • https://digireg.cz/upload/gegijotomolelefusofeka.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e83e8335ca---89470805051.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2e360ad2f0---64554983694.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b371f02e767---84208707975.pdfIn PDF document text
    • http://virtualcharityevents.com/vce_cake/files/files/78366346071.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/5bidtji23r5tktfkkuhr2cp5h0/rakakij.pdfIn PDF document text
    • http://aquamedia.cn/ckfinder/userfiles/files/pokidawajo.pdfIn PDF document text
    • https://tenekedjieva.com/uploads/file/xibesebi.pdfIn PDF document text
    • http://paneldeconsos.com/userfiles/file/rutalepovaledek.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=convert+pdf+to+image+open+sourcePDF 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_off0000e91b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE91B 17776 bytes
SHA-256: 5f8d9341610b24b0598934054d6e398a64c2ea82b9032d999b421dfc852f3edc
font_01_sfnt_off000116a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116A0 11112 bytes
SHA-256: 4bbb0812a071f86b8d636a4fb35c1c4c3aac21ae45d97b785a3c561a69e71cff
font_02_sfnt_off00013072.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13072 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1