Malicious PDF — malware analysis report

Static analysis result for SHA-256 008ca00138b46606…

MALICIOUS

PDF

82.5 KB Created: 2021-09-19 04:12:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: c96b968964f974e995f1753f6053b3a9 SHA-1: a5b6b7c24edf5ca11bbd350d5cdd167e67d5dce0 SHA-256: 008ca00138b46606e6628caf236ef4abd8003938ba2b1fa495d7e330ab990fe8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or distributing further malware. While no scripts were extracted, the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://www.bash.cl/media/file/fafoj.pdf In PDF document text
    • http://fantalife.nl/userfiles/file/86139620844.pdfIn PDF document text
    • http://taikenplan.jp/ckfinder/userfiles/files/dudugidovi.pdfIn PDF document text
    • https://miraclechuppahs.com/userfiles/file/81684915569.pdfIn PDF document text
    • https://luiginoiobbi.com/userfiles/file/piluwetudubunotewuxiki.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613e2c208fa1b---5899555548.pdfIn PDF document text
    • http://casier-a-bouteilles.fr/file/74423632547.pdfIn PDF document text
    • http://enjoyisagenix.com/ckfinder/userfiles/files/zerisotumemigisoderud.pdfIn PDF document text
    • https://limsurempat.com/contents/files/9145852356.pdfIn PDF document text
    • http://ymmicro.com/files/files/rolaxodegesotibisose.pdfIn PDF document text
    • http://acelybio.com/upload/files/21683952023.pdfIn PDF document text
    • https://haruhonpo.com/upload/haruhonpo/files/26572163900.pdfIn PDF document text
    • http://www.huescalamagiaenfotos.com/userfiles/files/45887791558.pdfIn PDF document text
    • http://skulpt.in/admin/uploads/file/runojojumunisiwitizukuv.pdfIn PDF document text
    • http://xn--90aoj0agf7cq.xn--p1ai/uploads/files/59870820676.pdfIn PDF document text
    • https://zivotzaokny.eu/res/file/27383105701.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/d35f352ba7a85bd3595ab8aeae35d2b5/tulinedona.pdfIn PDF document text
    • https://widerbet.pl/userfiles/file/46124893045.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fd5e27eb66---vuvob.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/igbaj99cjnr1cb6tp7fe8df3k5/44944868038.pdfIn PDF document text
    • https://muachungbaohiem.com/uploads/userfiles/file/87628225642.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+use+phone+as+a+webcam+on+pcPDF 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_off0000ddc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC4 17732 bytes
SHA-256: f4f51237c82f9af4dcc09cee0feb558d92fd1b8ef2270f838bc1c27b15709e20
font_01_sfnt_off00010c18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C18 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001242f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1242F 10720 bytes
SHA-256: 6866d67f1d183861a1db2d1e33f0ceef111e15e7d31fb1e13dc52447dc8a85f0