Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b060839ba1f1d80…

MALICIOUS

PDF

81.9 KB Created: 2021-09-02 01:56:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c6d308222f52cda6a8ad5730cf816772 SHA-1: 5e26a4ba3a43e101dd040290bd29e382009cc461 SHA-256: 9b060839ba1f1d80756d6788e5f98a98332d2b5cc7ea0f32da6f13e3e5ea832b
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting an attempt to redirect users to malicious content or phishing sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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 http://architettoannalisatinelli.it/userfiles/files/mosixusokapikasotama.pdf In PDF document text
    • http://willettelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/78888935961.pdfIn PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/kl33vab1ldql57ovp06kjl1ht1/burifewubinovedetofelisig.pdfIn PDF document text
    • http://9meclinic.com/ckfinder/userfiles/files/11617985332.pdfIn PDF document text
    • http://ottomaniantextile.com/userfiles/file/89657008377.pdfIn PDF document text
    • http://biosafety.biz/ckfinder/userfiles/files/34578503515.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/chkbltdon5g0p4ivm7c8i2k2mo/faruxupizapukubujexajolix.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/6ba76448277d2b17c1febec7eaa15925/zemutarifuxafokevuzox.pdfIn PDF document text
    • http://skomi.ru/img/files/file/bebozirejuxeluvemuri.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/e94500fc70db243a56db253f2a2f5b86/dojane.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/590ee8f6d5b66efb05e5744713247b30/zobagi.pdfIn PDF document text
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/0b6c119921293b116e804804ba12c449/88111152411.pdfIn PDF document text
    • http://www.hon-ro.hu/userfiles/files/fewotibavumunojakowub.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/6qk82fv23h1ju0hjrusm4fmgp5/40721310521.pdfIn PDF document text
    • http://peak-experience-europe.com/images/blog//file/peporetogemi.pdfIn PDF document text
    • http://nfrostov.ru/upload/files/vubop.pdfIn PDF document text
    • https://iwistw.com/upload/files/49157054011.pdfIn PDF document text
    • https://mama-light.net/business_school/uploads/file/kokadirikubisejini.pdfIn PDF document text
    • http://autodilykanka.cz/cmsimple/images/file/87057392873.pdfIn PDF document text
    • http://rspon.pl/images/wyswig_images/file/31993531923.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160734c8a76205---samiwowomegukudawivi.pdfIn PDF document text
    • http://chroscina.com/userfiles/file/lotezejadotelaropuxarivev.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16123ad8d6bd72---tusujezadikod.pdfIn PDF document text
    • https://wittnebel.dk/file/86075351090.pdfIn PDF document text
    • http://aedelsur.com/contenido/files/50325808425.pdfIn PDF document text
    • http://optimumnieruchomosci.pl/uploads/userfiles/files/45914404092.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=capricorn+woman+in+bed+with+aries+manPDF link annotation
    • 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_off0000ddfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDFE 16112 bytes
SHA-256: 40881f52ad5ceebd8677f82749c05cfa3302ce71fed848108eac753892fe3960
font_01_sfnt_off0001079e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1079E 10992 bytes
SHA-256: 8c6149cd84fb30e5ed8ee85001884086a234746766781e72d2b537e6ebc8c324
font_02_sfnt_off000120cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1