Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9be5695879f95a5…

MALICIOUS

PDF

79.8 KB Created: 2021-09-04 15:06:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 4587afed704879540a7bfcef22376b14 SHA-1: ec95629f11282d13dafd89d60d679ba850d17d30 SHA-256: f9be5695879f95a56a43af26480265f85efa75127c59383c7e624b05ae780749
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan distribution attempt. It contains a link farm pointing to compromised WordPress upload storage, suggesting it's designed to host and distribute further malicious content. The presence of external URIs and a high ML score strongly suggest it's part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609898045015f---rigekorifi.pdf In PDF document text
    • http://aihyang.com/userfiles/file/48797005436.pdfIn PDF document text
    • https://patc.fr/imagesfile/30160117647.pdfIn PDF document text
    • https://badrivishal.com/media/zenibefuw.pdfIn PDF document text
    • https://advantagelic.com/singhania/downloads/file/sabuk.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/bb87469ca7f17c061e8d06c0f05a4ea4/45190443025.pdfIn PDF document text
    • http://bjeclinic.com/ckfinder/userfiles/files/repexajofekojoletiperom.pdfIn PDF document text
    • http://zuche0551.com/upload/file/ladigupiwibar.pdfIn PDF document text
    • https://futuresbuilder.net/dayafter/uploadimages/newsimages/file/35824345173.pdfIn PDF document text
    • http://veejaytechnologies.com/userfiles/file/58366815152.pdfIn PDF document text
    • http://zwickerfoto.hu/_user/file/96863919917.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/5de87c5fb2c15eabc8525d24c8c3c54c/wamokujimiri.pdfIn PDF document text
    • http://hgbs.de/userfiles/file/jepakeforuxuzu.pdfIn PDF document text
    • http://www.badischer-kunstverein.de/ckfinder/userfiles/files/jobefitaz.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160e0b80284d10---93427881793.pdfIn PDF document text
    • http://classicalgardenfountains.com/uplds/file/22128224799.pdfIn PDF document text
    • https://zippy-inc.com/app/webroot/userfiles/files/16081566858.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/829b760e4ef7b4bf9f05654309ad5047/72799001846.pdfIn PDF document text
    • http://viettelhaiphong.me/data/dulieu/files/kogugodukijelujaxarijozo.pdfIn PDF document text
    • http://1960whs.com/clients/7/73/73384dfd0d582a2861cf356c55c3c578/File/99125166413.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16093a084a6c09---konemelejaxobukegidesa.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089518b7e675---51056182959.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/vkmb05bjgk09rc60pfpmroc5ts/jelupa.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160cc3d6ec7c04---92484920634.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=pdf+editor+apk+free+downloadPDF 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_off0000d287.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD287 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ea99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA99 18112 bytes
SHA-256: 03271a5be47dbaf656eefef7a7d137b93854693bbae21cbd1ca6d1e29f68abf6
font_02_sfnt_off00011925.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11925 10504 bytes
SHA-256: 50b6cbb71880768be4472c9a7bf1e95e93f8ceb36f6e4440a163053df1a87162

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