Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e1e0759fa688626…

MALICIOUS

PDF

86.3 KB Created: 2021-09-08 23:44:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: fd7369a28ffc7995a2999ba6344c7fa8 SHA-1: 0a3977673b3ee3c7aa4d77a219c5594e0a0c7717 SHA-256: 8e1e0759fa6886260480b1c22904da79154978466b618471a377bcb3ddfd9fb8
204 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The document contains multiple links to external sites, some hosted on compromised CMS platforms, suggesting a lure to download further malicious content or redirect to phishing pages. The presence of a 'Payment redirection' lure heuristic further supports the phishing attempt, likely aiming to trick users into changing payment details.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://smidgel.ru/uplcv?utm_term=boost+video+volume+android PDF link annotation
    • https://cs168.tw/upfiles/editor/files/43241459798.pdfIn PDF document text
    • https://solener.info/ckfinder/userfiles/files/74683095471.pdfIn PDF document text
    • http://thrifty-uy.com/files/others/72435189674.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/4g0da9gmu2r07rpfdjrbmkkrnn/61811683779.pdfIn PDF document text
    • http://tareeapartment.com/user_img/files/xijelenogilin.pdfIn PDF document text
    • https://ijacr.net/assets_admin/ckfinder/core/connector/php/uploads/files/bumegowup.pdfIn PDF document text
    • https://thietbivesinhsonhoa.com/webroot/img/files/13975621671.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/h7q0mavr3mf04he13p5c8uv9ie/mowisesexuboxoturenagoj.pdfIn PDF document text
    • http://cichanski.com/Upload/file/majelubudotinefebozet.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130c175a1abe---gufogubaburu.pdfIn PDF document text
    • https://autopits-directo.migrupoq.com/ckfinder/userfiles/files/zasuxukirib.pdfIn PDF document text
    • https://kaptenhoki.org/contents/files/wuzusole.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/351df24e44e00a24cd37d96da63cc21a/guwamebizegirafufubolira.pdfIn PDF document text
    • http://mtcnx.com/upload/fckimagesfile/1638207166.pdfIn PDF document text
    • http://sgo-bage.com/public/files/files/30757158420.pdfIn PDF document text
    • http://kamienneogrody.com/userfiles/file/14468080342.pdfIn PDF document text
    • http://ordineveterinarireggioemilia.it/userfiles/files/fozobanolijivulugi.pdfIn PDF document text
    • https://grandiosieventinuziali.it/filesUploads/file/90494356852.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA8C 10628 bytes
SHA-256: 7ba007bc4a8fd1d0469fb8fe0d720c21cf59044c8a8e2ee71d5565c12674c947
font_01_sfnt_off000102e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E0 18820 bytes
SHA-256: 81c25bac8647408c52540981f3ed269adc7bdbd5feaee5e54615fa7b3675e395
font_02_sfnt_off00013409.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13409 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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