Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f47bcdea2f7243a…

MALICIOUS

PDF

85.5 KB Created: 2021-09-02 22:02:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c77c25826adeef30307782c548860e95 SHA-1: 929d0c7ce57f8e6bd0556395bbb1e4258ff2ea96 SHA-256: 9f47bcdea2f7243abc308c8ef8012d9fdf746d9315d2c39aa603e0085894ac5b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress upload directories and other potentially disposable hosting, suggesting a link farm designed to redirect users. The presence of embedded URLs and the nature of the heuristics strongly suggest this document is part of a phishing or malware distribution campaign, likely using spearphishing as an initial access vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/8fe28251eed4c14b560508fe3190b669/sadunanuzirazu.pdf In PDF document text
    • http://toptoptraining.ru/img/upload/file/55200211852.pdfIn PDF document text
    • http://fantalife.nl/userfiles/file/desosazonuladev.pdfIn PDF document text
    • https://extremedriveline.com/ckfinder/userfiles/files/95014269680.pdfIn PDF document text
    • https://petrovsky14.ru/docs/files/sigumut.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/re0dc8jsut5jgc1oev7s8k1du0/18984649493.pdfIn PDF document text
    • https://envida-nieuws.nl/bsb_website/upload_fck/file/wadomurodutumin.pdfIn PDF document text
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/r5j0ts767pgdb0a1bomvbegmup/44351986964.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/1610469bb898e4---47225982210.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/efn7g618ai5srip754otr6gb3m/genuzifudoxipem.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/236949c46fb5db19a6fe5b7ada3df0ea/94122733590.pdfIn PDF document text
    • https://menlopark.com/wysiwygfiles/file/67170410066.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/801a28bf635f123087fe40e60cef7c45/57622179027.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/dcc1ee02dbb0b58383555db4f94b495c/50237045195.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac04df8215e---21077529406.pdfIn PDF document text
    • http://tate79.com/clients/868750/File/delotedevukafonuluboxisiw.pdfIn PDF document text
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/99423715c93efce224ef49d8ed29f34a/94752433886.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/4qfqsbmkudo4okb9beavvskoof/67310837604.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/1e5dc8da488c1f3dbb46d80cef0dfdfd/9917260531.pdfIn PDF document text
    • http://congtyvima.com/images/Download/36991922662.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/2e9bec99e03165cca64e91de754b2dc6/talimipudutubuwirowa.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/tvsd22qrqg40iiod5bob9ebr70/42275039449.pdfIn PDF document text
    • http://sns-russia.ru/userfiles/file/tovasufenuwogivilupep.pdfIn PDF document text
    • http://alburigiott.it/userfiles/files/93295034121.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160aae3d281fd2---31421329380.pdfIn PDF document text
    • http://familiegravesen.dk/userfiles/file/ribitejadorasefes.pdfIn PDF document text
    • https://www.ideaklinik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ecc9d48668---73845902917.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=grand+grimoire+of+cthulhu+mythos+magic+pdfPDF 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_off0000e6d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D6 11320 bytes
SHA-256: bc87a6aaaa0506aa8f939c65018307059c34d324e01588f7c28458e29baf81cb
font_01_sfnt_off0001011a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1011A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001192c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1192C 17848 bytes
SHA-256: f3a876474943350133b0b85887e602c86bde77f03848ba7a5e471d1649f15c6e

Open this report in the interactive analyzer, or submit your own file for analysis.