Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fa9cdf02d7f89da…

MALICIOUS

PDF

132.1 KB Created: 2021-09-07 04:57:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7e470f2b8385cc2f46e788ad68d9a20c SHA-1: 7dc8b152215a337636612925d4d2637ed33c403d SHA-256: 7fa9cdf02d7f89da6a381686df8ec4fbd86392e6d033099c37dd4a63796eba86
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, indicating a high likelihood of malicious intent. The file contains numerous links pointing to compromised websites, suggesting it functions as a lure to redirect users to potentially harmful content. The presence of external URIs and link farms on disposable hosting further supports its role in a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://crysiq.ru/uplcv?utm_term=canto+1+purgatorio+pdf PDF link annotation
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160758764cbabe---bafanigedofuwozu.pdfIn PDF document text
    • http://hoitruyengiaocodocvietnam.com/uploads/image/files/83443531657.pdfIn PDF document text
    • https://bimetoor.com/basefile/bimetoorir/files/fagofawemivudusavim.pdfIn PDF document text
    • http://cn-junsheng.com/upload/file///202172181740498.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/6751a3c62f82da7ad58a66e71ef4f4a6/wemokosexewebasupewusowi.pdfIn PDF document text
    • https://www.adoz.cz/ckfinder/userfiles/files/vojefizazodo.pdfIn PDF document text
    • http://xn----7sbakif2a3azdub.xn--p1ai/admin/ckfinder/userfiles/files/58128535467.pdfIn PDF document text
    • http://serting.eu/userfiles/files/72401570307.pdfIn PDF document text
    • https://volgogradexpo.ru/ckfinder/userfiles/files/suvap.pdfIn PDF document text
    • http://usefchina.com/uploadfile/file///2021082012553941.pdfIn PDF document text
    • http://weymouthhighschoolclassof62.com/clients/5/50/50fe23896e84432c97ff20d680692bb9/File/69385484053.pdfIn PDF document text
    • http://studiolorenzoni.eu/userfiles/files/faken.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/ea72cbecb74c018124868651b141d093/liputixelutura.pdfIn PDF document text
    • https://bobecoingatlan.com/uploads/editor/file/venisadetopakagejewo.pdfIn PDF document text
    • http://anapharmata.hu/ckfinder/core/connector/php/files/13480472424.pdfIn PDF document text
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/0kjhsvsvuc2b11t5u7nem28h10/12112054149.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f73332efcb---51741113748.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e95a65c57aa---nivebis.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/60d48654d73166a2e1a824ead8d3983d/29987455997.pdfIn PDF document text
    • https://fotofidelity.cz/userfiles/file/varokawuwuzidovuwawexo.pdfIn PDF document text
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/0d8fe13d041f46a8d93aa208bddfa800/xinasiwulopaderelipij.pdfIn PDF document text
    • http://hajni.pl/userfiles/file/jusojenivilug.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_off0001a19d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A19D 18500 bytes
SHA-256: f8c3569ca05842bcd4f7dacf5b15c57e4884e48c506cfca2d955f800e5bf0b5b
font_01_sfnt_off0001d26d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D26D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001ea84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EA84 10508 bytes
SHA-256: 0d0600500da0333348cb4f8e4cffb5a8b9d34f72b943fda9e2486e5bc67981a4

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