Malicious PDF — malware analysis report

Static analysis result for SHA-256 414aa2aa005e2dab…

MALICIOUS

PDF

83.6 KB Created: 2021-09-08 06:25:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 617542e2cb21fcbf57de2a1ec4e95f6a SHA-1: fade93c78073573a1ec100348749d23442b606b2 SHA-256: 414aa2aa005e2dab4711c585578aee3d814735bfe3c095404a3d69717fbeb3ce
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous links to external websites, many hosted on compromised WordPress installations or disposable domains, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the nature of the heuristics point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://pixomot.ru/uplcv?utm_term=3m+bair+hugger+775+service+manual PDF link annotation
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/af20fea2e986a3aff353847d1b8cdc3b/90882297471.pdfIn PDF document text
    • https://louvre.lv/res/wysiwyg/file/mufoja.pdfIn PDF document text
    • http://gps-ambroisie.com/ressource/site-image/files/kumivaregunawegi.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f51aa03c5e5---28249684044.pdfIn PDF document text
    • http://immobilieninvestors.de/userfiles/file/55580160584.pdfIn PDF document text
    • http://datavincity.com/uploads/ckfinder/files/muwekufapalim.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/0aea24dd921b256131cd9184138f4646/vilefigipusenida.pdfIn PDF document text
    • http://shinhwajudan.com/userData/board/file/kamesirane.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/3fn0ftdadd71uji3dqrtfkaoki/18274633671.pdfIn PDF document text
    • https://roweryelectra.eu/app/webroot/uploads/file/16265937546786.pdfIn PDF document text
    • http://denge.aero/upload/files/8196499778.pdfIn PDF document text
    • https://intervalhousehamilton.org/ckfinder/userfiles/files/wojuzurivuworikaf.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/qkdpv321uvvm9g10pca75u0sda/9222038332.pdfIn PDF document text
    • http://svsteinfurth.de/radsportfiles/file/wakafigejalegunemefelazut.pdfIn PDF document text
    • http://newbusan.net/FileData/ckfinder/files/20210831_45A1A565346B0844.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec62859bde---92728479092.pdfIn PDF document text
    • http://szyqjsj.com/UploadFile/file/20210824194217520.pdfIn PDF document text
    • http://kovove-ploty-brany-zabradli.cz/UserFiles/File/zaxujuloradozerofisal.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/svje23t1ddq475q4l85ulfb4ul/35356820981.pdfIn PDF document text
    • https://organicearthfiji.com/documents/file/76656699933.pdfIn PDF document text
    • https://hotelmitrutarija.com/uploaded/files/81323078628.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c2d0bc51b28---vosajegimam.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/3c63c9d0324ed317fbf4bbaf3297fedc/19939862418.pdfIn PDF document text
    • https://binarbaidfabrication.com/public_html/userfiles/file/58529536309.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3e13382aff---lamokabigijukosebuwijewe.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC87 19120 bytes
SHA-256: 3a59e9bd7623e7b485a46cc0407521ab3a7ffec0c5365398ed4455aff64134f3
font_01_sfnt_off00010f26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F26 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001273d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1273D 11024 bytes
SHA-256: 1cd71e211057f66fab935126739282781684593115efef2f1aa70d7d6a9eef4c

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