Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf6679b468ed3a1a…

MALICIOUS

PDF

88.3 KB Created: 2021-08-16 09:16:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: dd73634357ec15b261fce8df9856c362 SHA-1: c80e339e4a00ba7d01f5900d881a3ed4eb501dab SHA-256: bf6679b468ed3a1a379ef55509fb4bcd06068ba8381732e6bbf1e3a588727d90
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous embedded URLs pointing to compromised websites and disposable domains, suggesting it is designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery. While no scripts were directly extracted, the structure and URL patterns are consistent with exploitation attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://archism.ru/uplcv?utm_term=hack+mini+world+full+ti%E1%BB%81n+apk PDF link annotation
    • https://marblo.ph/app/webroot/img/files/42722394257.pdfIn PDF document text
    • http://somersetcountybar.org/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vowujaridalemusidave.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e053a6afee---sovegagamutu.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/aa0a4e67b6c323b1387406aadb6ae7ab/vumusu.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b853e65b32e---jixutuwuguvegem.pdfPDF link annotation
    • http://truhlarstvisollner.cz/data/file/gozesagupa.pdfIn PDF document text
    • http://erex.hu/upload/file/37608971008.pdfIn PDF document text
    • http://recko.ru/ckfinder/userfiles/files/xevesodovodovovotasosuv.pdfIn PDF document text
    • http://veivel.com/userfiles/file/degopogoxuwabawig.pdfIn PDF document text
    • http://chanakyaaerospacedefence.com/userfiles/file/25964372419.pdfIn PDF document text
    • http://equipociclistaugeraga.com/ciclistas/userfiles/file/tosugeka.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/4f4c0228c84ccfbefcca0daa3aea8b71/dotominapoxaripe.pdfIn PDF document text
    • https://ccskin.com/geektic/files/86804170158.pdfIn PDF document text
    • http://lempreintedubois.fr/userfiles/lempreintedubois.fr/file/muligutinoxevutopudafexi.pdfIn PDF document text
    • http://khocabien.com/uploads/files/xavarekufokog.pdfIn PDF document text
    • https://chaletsuenodesol.de/files/mowitesazumi.pdfIn PDF document text
    • http://leilehua76.com/clients/4/4d/4d80c013f15dbe3c797666a457780dca/File/zebarat.pdfIn PDF document text
    • https://lederstuhlshop.de/ckfinder/userfiles/files/50968358663.pdfIn PDF document text
    • https://lapakunited.com/contents//files/mumak.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c230bb1903b---71244336962.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/16082237607bc1---bijojaberumarosuvegi.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/fe436388799fb626026cc2158e3c4947/44829574034.pdfIn PDF document text
    • https://asmitahrgroup.com/ckfinder/userfiles/files/18542851078.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/59f87d62651de6db6d0489d254182931/jixujagijotazatuxig.pdfIn PDF document text
    • http://formel1vermietung.de/userfiles/file/2301448466.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_off0000e485.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE485 29556 bytes
SHA-256: 874e141f29aa2b6372e3f5d703935a0dd5c9f38652c03db81d0b58dcdf147e4e
font_01_sfnt_off00011f10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F10 10932 bytes
SHA-256: 8b6bff97f716076681d572572f855afd69d103a42921255a5570f92c8e028478
font_02_sfnt_off0001386a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1386A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1