Malicious PDF — malware analysis report

Static analysis result for SHA-256 024cd2c83768fb6d…

MALICIOUS

PDF

85.9 KB Created: 2021-06-25 17:24:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 01aa4ae9573486b15adf67d883560001 SHA-1: f35bff7396dc9ba6188258063b99f923231b2580 SHA-256: 024cd2c83768fb6d5a977d973df920885aa11ae00f7972a79fb837a6e844af46
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing trojan. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites, likely to host malicious content or facilitate further attacks. The presence of these links and the overall detection indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ab67178d034---vofujapi.pdf
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1607089d64fe84---kifawonufe.pdf
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/2799b14507d31247670325e358b40ebc/11806348394.pdf
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095c3f6af7bb---jugowaja.pdf
    • http://kagoshimakojintaxi.com/userfiles/file/keturomekinezejofo.pdf
    • http://khiconghoixuancong.com/Khicong/admin/userfiles/file/mobuvisekefereju.pdf
    • http://princeverma.in/uploads/files/gawesiwovudonivi.pdf
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9bb278f084---30499331012.pdf
    • http://ggmtc.net/userfiles/files/figiwojaratokodon.pdf
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b456602d706---5940441553.pdf
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/1a8dd099dbfe01757476f97ffe20be81/14278733216.pdf
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dc90b5ee96---7686887513.pdf
    • http://0930actress.com/files/files/pabanubaxugipiretevujo.pdf
    • https://aitalk.vn/upload/files/devomimedajifew.pdf
    • http://mrmax.ca/clients/9797/File/memabafe.pdf
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160741e64dbd17---tubixuvapadedobuw.pdf
    • http://aarogyamedico.com/userfiles/file/98659201266.pdf
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd8beaaeeb5---fugivokimizu.pdf
    • https://andrejc.si/files/file/texifodogososom.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160920137a4320---bewusomem.pdf
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/463a1f8aed06bfd3ac890c4010e37211/80063298813.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=i+can+tear+down+mountains+riddle+answer
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec80.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC80 16792 bytes
font_01_sfnt_off00010492.bin
fc39a0b7d9aa2e8800d324cd0b3f65780607e16a83bbafca0077393f4c953552
pdf-font-stream PDF embedded font (sfnt) at offset 0x10492 17304 bytes
font_02_sfnt_off000131bc.bin
7b31238c43e1943db62f4079695ec94ddbe38a411f7801f9a40dcf43516ac99a
pdf-font-stream PDF embedded font (sfnt) at offset 0x131BC 10668 bytes