Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cdd7e7019914629…

MALICIOUS

PDF

86.6 KB Created: 2021-07-02 02:22:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 4f744ecd9543b71723ad776c0fc6bea5 SHA-1: 74a8f314be83bca7dd7c2ade0adce0881647cba5 SHA-256: 0cdd7e7019914629a60c3f8f370f3c37c83bf1b985c3063290c4f93e550878ca
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links pointing to compromised WordPress upload directories and other disposable hosting, suggesting a phishing or malware distribution scheme. The presence of external URIs and link farms indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://irlanc.ru/uplcv?utm_term=boyfriend+withholding+affection PDF link annotation
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/b29e88103e38a8c1218906c998da65d3/55556802663.pdfIn PDF document text
    • http://alexanderkanevskyartistbiography.com/clientMedia/file/78608584042.pdfIn PDF document text
    • https://luminex.pl/upload/file/pasawoxakabolulojisuxudov.pdfIn PDF document text
    • https://asiastudy.in/ckfinder/userfiles/files/42156623271.pdfIn PDF document text
    • https://balticstroy.com/uploads/files/54897788221.pdfIn PDF document text
    • http://myxroad.com/upload/userfiles/file///segatizeviladiluv.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160db99adad203---31743683570.pdfIn PDF document text
    • http://tcsm62.org/uploads/news/file/budivedimamijixezerazop.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/5g3nu27djrbo1p28e9u13hqagc/58359031979.pdfIn PDF document text
    • https://bank-kredit.at/ckfinder/userfiles/files/17334922431.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa7b4cc9c87---nekilutov.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ac584055cc6---21072663230.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160a8a0550dad7---nobevedafopuxabuf.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/4bfd67230d63644d4551c664e64cd346/lilawexulix.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/fa4b831943cda2fbc5b04d483925ddad/seratinaso.pdfIn PDF document text
    • http://bayernglobal.de/userVZ//file/gakar.pdfIn PDF document text
    • https://alamansyria.com/userfiles/file/xumotumatuzuwizefabi.pdfIn PDF document text
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160abff90169da---40423823577.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d0cc2d902e7---88061991485.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/e30735f0ce321e4323e9deecd97d8056/rakagabejatudukoji.pdfIn PDF document text
    • https://brahmagnanam.org/fck_uploads/file/betupogudeliwamakobat.pdfIn PDF document text
    • http://footstepfloor.com/upfiles/files/3161613688.pdfIn PDF document text
    • http://pc75.net/upfiles/file/1622807443.pdfIn PDF document text
    • http://lempreintedubois.fr/userfiles/lempreintedubois.fr/file/sofozivoxoxajevemo.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160ac9f6deb45b---79843568829.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_off0000f127.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF127 16712 bytes
SHA-256: aed5af53e78c27f8331839e2fd9327f492a713bd02f8ec379b5cadb484edbfdf
font_01_sfnt_off00011c11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C11 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013428.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13428 10840 bytes
SHA-256: 933457877900c1bbcefb9d4ecbca3a98bd1a264c0d2f1bafbb1725238a957250

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