Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c1d149a555da9a4…

MALICIOUS

PDF

85.9 KB Created: 2021-10-05 06:14:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: c01adcff0f05ecc502723213e1daf9d1 SHA-1: 82f753ecd8eb6d83083ea68f8d281a6f55586b13 SHA-256: 6c1d149a555da9a493fabc99dbd7862fdf323b0e1a315c72807fa8fb85fa8e2d
134 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external URIs, many of which point to domains that appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or a scam, by directing users to potentially harmful content through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://tradingphrases.net/userfiles/files/fefuzuxur.pdf In PDF document text
    • http://architettipassarinmarzotto.com/userfiles/files/85303703028.pdfIn PDF document text
    • https://apaman.ti-am.jp/js/ckfinder/userfiles/files/gisepenamupola.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131db59e0128---76588837469.pdfIn PDF document text
    • https://fivetc.net/uploads/files/73529939833.pdfIn PDF document text
    • https://etravelbox.com/scgtest/team-explore/uploads/files/tufovenajojuduvelew.pdfIn PDF document text
    • https://pmeds.us/userfiles/file/kigizotakazazotimo.pdfIn PDF document text
    • https://998.geektic.com/geektic/files/fumipajupaf.pdfIn PDF document text
    • https://chameleoncoupons.com/adgprocessing/uploads/files/6230419635.pdfIn PDF document text
    • http://tubemakingmachine.com/uploadfile/files/nagam.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613c9794d9eb5---tavone.pdfIn PDF document text
    • http://wellnesszeewolde.nl/site/data/ws/files/dopafegumebaba.pdfIn PDF document text
    • http://bagodilovaspark.hu/userfiles/file/91212779575.pdfIn PDF document text
    • http://webinaris.org/ckfinder/userfiles/publics/files/97541967252.pdfIn PDF document text
    • https://ikincielinmak.com/upload/ckfinder/files/39123609653.pdfIn PDF document text
    • https://qud27rxl1-k61l.com/contents/files/gawugurim.pdfIn PDF document text
    • http://manhtreminhduc.com/webroot/img/files/zixek.pdfIn PDF document text
    • https://chogmai.org/ckfinder/userfiles/files/36428746535.pdfIn PDF document text
    • https://bloomland.com/sites/bloomland.com/files/fimegodumawokuziwig.pdfIn PDF document text
    • http://lawyersmarketingusa.com/user_upload_image/file/In PDF document text
    • http://hifitness.hu/userfiles/file/13379986172.pdfIn PDF document text
    • https://klubkanine.com/home/klub/public_html/ckfinder/userfiles/files/90737522570.pdfIn PDF document text
    • http://ominocoibaffi.it/userfiles/files/torurupukolapuboweli.pdfIn PDF document text
    • http://st-johnson.com/Uploadfiles/files/42395125553.pdfIn PDF document text
    • https://fidelishospice.com/ckfinder/userfiles/files/duweteguzizalabagivof.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=human+life+value+approach+formulaPDF 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_off0000eb6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB6A 17816 bytes
SHA-256: 4d32b486634ea51d6fdc014a421f6ea20dd64fc1971192fb77749f8867dd0321
font_01_sfnt_off0001197c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1197C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013193.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13193 10636 bytes
SHA-256: 8dbfe9cac8f51282dc99c352586168fbbc8d117ed99f281b002f1b1b135f9168