Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bb5b1e60ca04e69…

MALICIOUS

PDF

77.8 KB Created: 2021-06-28 04:41:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bb145f48317d26e937b207e480c722f8 SHA-1: b30bf46752ab01d8d5da92058f86f506b9ef9b5a SHA-256: 3bb5b1e60ca04e69f496a1547f89f4d0e1acb6786c3a7f069d450076c360633c
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://queure.ru/uplcv?utm_term=beginners+protection+spell
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079bf3d51457---46596284537.pdf
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/tpfashsftf4s2a4mpuf1s26gtc/panifenusodumekogujon.pdf
    • http://contentworks.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8bc7b2391---xekilojosugil.pdf
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/c4c349eb7d335e1259771414f1d95463/84372239357.pdf
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd0b255d31---23910329213.pdf
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/d2cuusmrhf36qdhrn6nfap4pb0/82794325840.pdf
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c5086e4185---26401793693.pdf
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b00cb4ba717---romizi.pdf
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/k9p5nlpdegc451soodvmirhck5/53554348379.pdf
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608172399fee8---58179860856.pdf
    • http://bwc.lt/i/nufesapuraxomipalegodabet.pdf
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa954207dfd---25419078135.pdf
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16080f9afb753c---45663715500.pdf
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079f1d562c5e---gusipewusuzases.pdf
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086c4d125027---suluvovunutotunevadaniwex.pdf
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/6dc5bc04202cb6d54dd7a2bccb690343/13251575440.pdf
    • http://www.teeintact.com/admin/fckeditor/editor/filemanager/connectors/php/img/file/mopazinunaxa.pdf
    • http://barcelonasixtytwo.com/userfiles/file/zajek.pdf
    • https://itacademyindia.com/ckfinder/userfiles/files/senolozutiwewiraxeretej.pdf
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ad802790eec---99843214501.pdf
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa35b14a0f---moxopozirisisajowanux.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/1d3h4igv1m67h8l34c6bejmof6/71072504008.pdf
    • http://aclamerica.com/customers/CMS-IMAGES/file/22386487943.pdf
    • 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_off0000cf88.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF88 16792 bytes
font_01_sfnt_off0000e79f.bin
4b25f219d2a05f73d8170d67197fac5d911f05f3e4445eee242d21d34f879483		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE79F 10440 bytes
font_02_sfnt_off0000ff69.bin
191b84de90e406c109039022689473f1dbc0217a85d5c8a6b85652bfa752453f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF69 15996 bytes

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