Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bc97947bb86ef5a…

MALICIOUS

PDF

87.8 KB Created: 2021-06-30 06:44:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ace1987a3a7191d8ab6c7b8c3dda3245 SHA-1: 41c8767ad9cb02f5a2ef5cbc05083de6a0c863c9 SHA-256: 0bc97947bb86ef5ac6479371c7e953a8004df31a72426669a02fd41b9d98a9e5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. ClamAV and ML classifiers strongly indicate this PDF is malicious, likely a phishing or malware distribution lure. The presence of multiple distinct hosts and the use of formcraft/super-forms plugin uploads suggest an attempt to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca7f1d54513---5420056813.pdf
    • https://sitpchemcieszyn.pl/_sitpchem/file/15012857087.pdf
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/5c19339dfeb49e925e55904eac636288/guraluredezevil.pdf
    • https://luyenthitoeic.info/userfiles/file/ravuvenid.pdf
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/32584382500cf073bc00b8353acf4da6/96768854371.pdf
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/nenubatagotajerilaza.pdf
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/16079904cc51e7---kudedejevib.pdf
    • https://mediaget.ru/userfiles/files/talagaso.pdf
    • http://n2nnetworks.com/files/others/dopage.pdf
    • https://ilmercatinosottocasa.com/file/novezidotimuruluragugi.pdf
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca5ca53bec---zuwanowopiwolijovali.pdf
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a71014d0e7c---ninozedulavokagave.pdf
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad5c3ca9c44---26708880876.pdf
    • http://divorcefinance.nl/uploads//file/sewawikegifukuramopi.pdf
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f151ef11c---98417234726.pdf
    • http://ttlh.vn/storage/ckfinder/files/65745683562.pdf
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dbe1cf28ee6---72660269927.pdf
    • http://detikakdeti.ru/img/file/44549554556.pdf
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/f5fdbab0ec10d52815ef5e73d771cd42/popuso.pdf
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/5237226ecfbe81387927a2bce2940bea/55864409294.pdf
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/67f7876408628fd56d2386fb161aca19/tenizib.pdf
    • http://willbramephotography.com/tasexofuxijorewab.pdf
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/ced1c1b05731b9fe6e52bbd49cdd8f87/821941332.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=i+want+to+see+u+in+spanish
    • 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_off0000f239.bin
01f0ae732278dedfbbb3e11f2de3db703c81f35914e4c8c3203e03dfa4f270de
pdf-font-stream PDF embedded font (sfnt) at offset 0xF239 10340 bytes
font_01_sfnt_off00010999.bin
1a28b5370d913f0deb75723386cdfafaa1b7c4cc9e7dc9a48c73198ce74c983d
pdf-font-stream PDF embedded font (sfnt) at offset 0x10999 18672 bytes
font_02_sfnt_off000139f7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x139F7 16792 bytes