Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7e64735e740ad6a…

MALICIOUS

PDF

67.8 KB Created: 2021-09-14 09:01:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: dff9f6a8669b84ee41f46c343ecc9588 SHA-1: aee9f811996f4f6a6fff4d1e7f8e5083ca22bbbb SHA-256: e7e64735e740ad6aa957e1be75855490e59b8be7fd5957e44e42c5ab06e871dd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many of which appear to be part of link farms hosted on disposable or compromised domains. The presence of 'utm_term' parameters suggests a phishing or marketing lure, aiming to direct users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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 https://medvor.ru/uplcv?utm_term=download+left+4+dead+2+for+android PDF link annotation
    • http://cka-shiba.com/ckfinder/userfiles/files/xexato.pdfIn PDF document text
    • https://mexico-airport-transfers.com/ckfinder/userfiles/files/58406580519.pdfIn PDF document text
    • http://fjzy18.com/image/uload/files/pemiravo.pdfIn PDF document text
    • http://noclegsosnowiec.pl/eurostyl/photos/file/4908554295.pdfIn PDF document text
    • https://bucatariizidite.ro/printuri-fi/files/97451053330.pdfIn PDF document text
    • http://xn----7sbbgprpk7biiq.xn--p1ai/admin/ckfinder/userfiles/files/57734786121.pdfIn PDF document text
    • https://illustrations.noche.fr/images/files/pimakukulofamesudos.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613eca6d7a766---55983442610.pdfIn PDF document text
    • https://fruitssupplier.com/app/webroot/img/files/zabotefunefavul.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/16135bece3c77e---74851821684.pdfIn PDF document text
    • http://makesrealsense.com/ckfinder/userfiles/files/zamumuxedinutoniv.pdfIn PDF document text
    • http://execdentalclinic.com/uploads/ckfinder/userfiles/files/sokak.pdfIn PDF document text
    • https://littleedupark.com/ckfinder/userfiles/files/nopabedanexuwisulatiw.pdfIn PDF document text
    • https://rajatotogroup4.com/contents/files/purekorojupufozij.pdfIn PDF document text
    • http://tion.hu/upload/file/gimumil.pdfIn PDF document text
    • https://acavacecio.it/userfiles/files/25970489895.pdfIn PDF document text
    • http://ccsl.asia/files/bujirevureriluzibile.pdfIn PDF document text
    • https://mashura.co/userfiles/files/52404637823.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/473326dd1bae43ad15c5b39fdba30a47/16982391489.pdfIn PDF document text
    • https://coastalstudio.com/images/main/file/45709783921.pdfIn PDF document text
    • http://lighthouse-connection.at/myPix/file/nepowobusenuvadakinulozu.pdfIn PDF document text
    • https://gameclub.by/uploads/files/laxali.pdfIn PDF document text
    • https://eventpro-kontraktorpameran.com/uploaded/files/14714758265.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_off0000ae17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE17 10464 bytes
SHA-256: 82093ffbec4daf3c929895af0d52ee43ae11ee7b95278fee9262a31d1d07aba5
font_01_sfnt_off0000c616.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC616 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000de28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE28 14396 bytes
SHA-256: db879c79914503eab43db0a5eaa658a0edca6e7580eb69935bb7207456e197d4