Malicious PDF — malware analysis report

Static analysis result for SHA-256 fed35951dc873563…

MALICIOUS

PDF

85.8 KB Created: 2021-08-04 01:41:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: e2805c68a42cad359cf3b529a025cf13 SHA-1: 0277fa5f01fea7c3b82e7379a5ea5ffb59e7f287 SHA-256: fed35951dc8735633e057cadbaff5bbb8415c5480f40fed90c790a766a8475a2
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and exhibits characteristics of a payment redirection lure. It contains numerous embedded URLs pointing to various domains, many of which appear to be part of a link farm designed to obscure the ultimate destination. The heuristic 'SE_PAYMENT_REDIRECT_LURE' strongly suggests a business-email-compromise pattern. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://irlanc.ru/uplcv?utm_term=facebook+lite+apk+for+android+4.4+2+free+download PDF link annotation
    • http://adria-ex.com/images/blog//file/fefibujejuzulifaxalebas.pdfIn PDF document text
    • http://tencanpowder.com/d/files/timikiwuwebenofukot.pdfIn PDF document text
    • http://biaikatolikus.hu/files/file/63960853516.pdfIn PDF document text
    • http://vinag7furniture.com/app/webroot/files/editor_upload/files/fafejalaxabogafupujunuxeb.pdfIn PDF document text
    • http://xn--365-pn7mwb654m2qn.com/ckupload/files/dewejakirajomilav.pdfIn PDF document text
    • http://ufnk.fr/app/webroot/files/file/32042592761.pdfIn PDF document text
    • http://burragebrothers.net/demo/jolie/beta/userfiles/files/rotuxozu.pdfIn PDF document text
    • http://carroll1975.com/clients/4/4e/4e2b018d07aaa5a30c3e4fca1c7a8df7/File/wimeziwaxofuguzag.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/3474194646.pdfIn PDF document text
    • http://kmsenior.org/file/files/73352805789.pdfIn PDF document text
    • https://dolcezzecaffe.it/file/litegim.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/c9cfcd0f13b890cc1b119374ceb4c667/lizegezuv.pdfIn PDF document text
    • https://tenshinorchids.com/FCKeditor_upload/file/daruwizodirijikaniw.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/4ma9uk9utevv2l1lknna1hmp56/junudarub.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c93309db757611e21c58361cef9b4b52/favexasimewi.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/i8430ogdos2466l1r62ohfe7s5/falojolisepegolu.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b0731b3319f---73280463947.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16108b629c0669---fejepixof.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160adb13c0e86a---35452112450.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/aef85a11bc09541e3b86b5a3f648e80f/tususelowema.pdfIn PDF document text
    • https://ka-base.no/images_students/files/xupagugeloronokesi.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160993c6cdd548---bufowegalinesulelowa.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/31bc32b2bf91b495ed5700bfc2b35546/lezolapiwexenazipoku.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/66cbd683ffabb63b2394150555e4c9f4/96097709248.pdfIn PDF document text
    • https://accu-split.com/userfiles/files/28367262975.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d700.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD700 11004 bytes
SHA-256: 05f19aae8764ce5b558d07cc8216649b3fb1a02ac18524791441f8d09b494b5c
font_01_sfnt_off0000f08e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF08E 16216 bytes
SHA-256: 5c05522f2d0c326f85c66521cb99665eb80e5d5da4d2bc10b0fde58b24ee0b82
font_02_sfnt_off00011ab3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AB3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000132c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132C4 16092 bytes
SHA-256: 9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd