Malicious PDF — malware analysis report

Static analysis result for SHA-256 84e3cef28b40b8a3…

MALICIOUS

PDF

82.1 KB Created: 2021-07-01 12:05:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ef87ea32bacabb542518eb387028325d SHA-1: 6fe7668ff8816490e5aca9f618e89aa260459bad SHA-256: 84e3cef28b40b8a3243a5bd5ab01b47ed9c04c19ad0141936939bd2609625362
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.007 JavaScript

The sample was flagged by ML and ClamAV as malicious, with heuristics indicating it's a payment redirection lure. It contains numerous links to potentially compromised websites, suggesting an attempt to redirect users to malicious content. Although no scripts were explicitly extracted, the PDF structure and link farm heuristics point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://communeouchamps.fr/userfiles/file/49491318316.pdf
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/448730d8fa1b02ee12b716b31fdf9337/1591945336.pdf
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/0dbff0b89e06f7c13d352ce28095df64/jigopufitadapokoniwib.pdf
    • http://ehoron21.mn/uploads/files/xogajuvigebefixekewo.pdf
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e501754f09---59362488339.pdf
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/a3e740e23a68070f32e5aa2d218e8f60/xuzudibiz.pdf
    • http://attep.com/home/sandbox/domains/heekee.com.hk/public_html/ckfinder/userfiles/files/jetidemonumudoxetasuxi.pdf
    • https://adepotcustom.com/UploadFiles/file/20210430215409175.pdf
    • http://hutbephottaihaiphong24h.com/upload/files/niwoxabudu.pdf
    • http://daimarconstrucciones.com/images/admin/file/gupemiwexiviwotuzin.pdf
    • http://tcsm62.org/uploads/news/file/vutawikefatapomen.pdf
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608640dd61abd---12018078058.pdf
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/e5ee95d9am0ugbrmgpdue1bpou/3896552229.pdf
    • http://strandedtattoo.net/file/24608483341.pdf
    • https://defi128.com/userfiles/files/13640270923.pdf
    • http://score1forspencer.com/clients/4/45/4587145e2679cb7673d0e21b436e5c25/File/93056506335.pdf
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606d31ed3071c---vufulezugowoku.pdf
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfe9eda2ed0---19703756801.pdf
    • http://hongshengfish.com/uploadfiles/2021060203154717269.pdf
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16092f08395c8a---68395712234.pdf
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/882a19d86972d0d9018bd3ce7700ce8d/22146437902.pdf
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160bc84416f2f2---28784362033.pdf
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/ofmq6pf9krg8niu4479onaikmq/93951187480.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=dababy+lil+yachty
    • 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_off0000e151.bin
2794d1653deabf25779ede92a1d53a83dfbf47b1fad70e50d4493249cf8a1d4a
pdf-font-stream PDF embedded font (sfnt) at offset 0xE151 16888 bytes
font_01_sfnt_off00010d06.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D06 16792 bytes
font_02_sfnt_off0001251c.bin
b6699e1c8d609802ff77635517cc0210e5b2774cfa885612e2c891e012d2aec8
pdf-font-stream PDF embedded font (sfnt) at offset 0x1251C 9956 bytes