Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d45c9f220fdd88c…

MALICIOUS

PDF

86.8 KB Created: 2021-06-28 04:32:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 264caca83948336df134e5ca641023ff SHA-1: 6106f0253c07fc975ebb18ef2815e139eec74dfe SHA-256: 6d45c9f220fdd88ce236fb0ced8f061fc737dcf033fa624de65999f635e3ba0b
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with many URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to obscure the final destination. The presence of multiple unknown URLs indicates a phishing or redirection scheme designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/dcsgafliu5s2r1tc2l71tj5k6q/nokarupewamefovoxo.pdf
    • https://stmarys-perthamboy.com/upload/File/dudajaxapupin.pdf
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/ae1d97f94d97f2b043fb8335cf6d9dc7/poladexojo.pdf
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160792b2386ed1---bejef.pdf
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/a5006e422db4c497a4e7ac1ed35cb73d/16006439817.pdf
    • http://adveotec.com/img/file/naletojuwe.pdf
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16084965cd64f4---95645667483.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed9ca64d87---pafedevubukifax.pdf
    • https://hgb.se/filer/file/nepowerexinekazo.pdf
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1608ce604dd2e5---53604211750.pdf
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5f7d488c2---71557648471.pdf
    • https://dolmalatrek.com/userfiles/file/vowabudipabiwazinaxosupi.pdf
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/11344241798.pdf
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/16083959e0afca---78481189966.pdf
    • https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/d36623cd603bef92449de3bb496cfc57/88088299270.pdf
    • https://misionesmedellin2030.com/wp-content/plugins/super-forms/uploads/php/files/rqjb4bg4q2rha5tkbsprdi31k6/28963226308.pdf
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a3ef2a5ee76---rujixamigezipipoxafukove.pdf
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/a880b9f13c928bc2a8eabefdd9be4d2c/zalinikuje.pdf
    • http://xn----8sbaqfskngn1qi.xn--p1ai/userfiles/file/xuxixamisibosozelimijos.pdf
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608759ed26b55---40974754383.pdf
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/1609c46ab7f3a2---gajusabirofigexixisofeno.pdf
    • http://tovicetour.com/FileData/ckfinder/files/20210628_940831B161F408FB.pdf
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/17d4vb38m6ne0u7ngs3uevi83u/40853484836.pdf
    • https://atraba-holding.com/userfiles/file/13579243673.pdf
    • http://muskogeeroughers1967.com/clients/9/98/9899c641331876fb313f08ec475a0443/File/56198638780.pdf
    • http://clinicaveterinariabilancino.it/userfiles/files/wamiwuzevetire.pdf
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/16094be9716ef3---99674977159.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=live+fit+meal+plan
    • 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_off0000f140.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF140 16792 bytes
font_01_sfnt_off00010952.bin
e6f381c108938389d1500a32599696f5f5ec231384ebf13fc3b3f1d2105c2890		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10952 17040 bytes
font_02_sfnt_off000135b9.bin
cae0eef86a79a5b2e6c6c73599e1d10af8fc6b6000f560f1587d418f2ccdf65b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x135B9 10152 bytes

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