Malicious PDF — malware analysis report

Static analysis result for SHA-256 914e7433fd451de5…

MALICIOUS

PDF

83.9 KB Created: 2021-07-17 15:49:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 68560d52f4c6a867aad94a3bb7813582 SHA-1: a298cf02488e9f129eaa4def042aa6ca76f2f94b SHA-256: 914e7433fd451de5dc7b36a08896547e2947ff27c9d1fe29f8a0e2b13caa7ff0
196 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a payment redirection lure. It contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting an attempt to direct users to malicious sites. The embedded URLs, while some are marked benign, are part of a larger pattern of link distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 7

  • 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.
  • 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://aulacvn.com/upload/fck/file/19854185837.pdf
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/33283c4aacf9d1d3960bd5f146785393/felitevuludadafemapi.pdf
    • http://nhadatv.com/webroot/img/files/35164954911.pdf
    • http://nktrading.qa/file/files/zamonu.pdf
    • http://seoulsquare.com/userfiles/file/38285591698.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/0ckhj86fe45jsooifmpib96c93/bobemotozosev.pdf
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/b85da15a0220a544027881aa92ad4037/46602110484.pdf
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ec76b96242---59250486432.pdf
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/16225c268a2a615ff39f313bb124d974/6480877017.pdf
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075c0896a658---wataxuxonotoxujikedakasu.pdf
    • http://wsp.pl/userfiles/file/lazisiralabadimipenofa.pdf
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/c34c140866d846cf9572fd1bad10fe56/femipaxodaxugufosus.pdf
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160f0795eadce7---juludakapepapimisixafafu.pdf
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607f2c624b7c2---zubikamotemoxotex.pdf
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/njen5u32ncqtp5rriqk8b8lfjj/ludiboxinijotisojido.pdf
    • http://kashima.cc/userfiles/file/ramijizovuvetol.pdf
    • http://jinistudy.com/_UploadFile/Images/file/jabere.pdf
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/bd795687b8c83f73c562628c62e3e1b4/birigekederivotom.pdf
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bd359c7040d---36552070178.pdf
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/eaprah9m1fojogsoscqbl090vc/zamijaxanopugu.pdf
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/bnql78srcmt5p1vq8eormljrd0/nedatesafosoxevi.pdf
    • http://candientuvibra.com/images/file/sufibiwiniwogef.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=how+do+i+block+emails+on+hotmail
    • 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_off0000e561.bin
5e68b0239835c3f00d943cb087ae513d57d71af9c475051c1b7e784a2492692f
pdf-font-stream PDF embedded font (sfnt) at offset 0xE561 10844 bytes
font_01_sfnt_off0000fe3a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE3A 16792 bytes
font_02_sfnt_off0001164c.bin
0651fb77446a08d2c38d32e0362a92913c4e8467db5fe13c2bb91cd202880d7b
pdf-font-stream PDF embedded font (sfnt) at offset 0x1164C 16848 bytes