Malicious PDF — malware analysis report

Static analysis result for SHA-256 445562b8ad21e5b0…

MALICIOUS

PDF

84.6 KB Created: 2021-09-08 01:12:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: abf739caf5459868238cdb8927942a3a SHA-1: 84d61887d0d18d2ad9766c38b4e4d4d7f8d61227 SHA-256: 445562b8ad21e5b036d43d2d657f1252f2c61a2781626a3a8a9b9989597aed8f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing lure. The PDF structure and embedded links are indicative of a phishing campaign aiming to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

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://www.predia.cz/userfiles/file/93143635672.pdf In PDF document text
    • http://aep-tc.com/cache/fck_files/file/befavisurobuwekomadeviro.pdfIn PDF document text
    • https://ski-experience-japan.com/images/blog//file/benek.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/76969220387cf5d4215d6f1fcf4c5496/towemikeno.pdfIn PDF document text
    • http://immobiliareborghi.com/userfiles/files/21109996484.pdfIn PDF document text
    • http://ikcem.org/userfiles/file///tabodetakozaninagipek.pdfIn PDF document text
    • https://mtydizayn.com/userfiles/file/tudezudavubawodefofexas.pdfIn PDF document text
    • http://getampedmag.com/ckfinder/userfiles/files/labanefu.pdfIn PDF document text
    • https://investmentskillsgroup.com/images/userfiles/file/15243513318.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8cd6a5fa3---viwugagekafulevutil.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160982762b9b48---43486123297.pdfIn PDF document text
    • https://isabellepieman.com/userfiles/file/51304988478.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/16070ee97e29cb---saxekovomo.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/448110805.pdfIn PDF document text
    • http://somersetcountybar.org/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/73941737006.pdfIn PDF document text
    • http://hsiwww.com/image/files/20210724_224744.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/16074718acb9b0---raxifazufowiku.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/5d9ae09d9280e5a51f3e6ccd9f795f1a/gusepixepe.pdfIn PDF document text
    • https://hram-uspeniya.ru/ckfinder/userfiles/files/wilogize.pdfIn PDF document text
    • https://stegopackaging.com/wp-content/plugins/super-forms/uploads/php/files/4eitj4clgeinu50h8528ojmtc9/ridolaxikito.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/pg99dhoh3h1csnq5a833mrnta3/13880440852.pdfIn PDF document text
    • http://jinanxintiandi.com/userfiles/files/75140779879.pdfIn PDF document text
    • http://crmrealty360degree.in/userfiles/file/jizologe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=criterios+de+lupus+eritematoso+sistemico+pdfPDF 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_off0000e1e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E6 10808 bytes
SHA-256: ddbe7f2ad41850486782d89bedd823cb39eafd6c67572497c2c75f3f4928ce10
font_01_sfnt_off0000fadf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFADF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000112f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112F1 19628 bytes
SHA-256: 68ecbc9a3571f905415975dc8dc7240905b4a2ed4c02c8a9e2ac6180fb6b2aff

Open this report in the interactive analyzer, or submit your own file for analysis.