Malicious PDF — malware analysis report

Static analysis result for SHA-256 49f10e1a5764263d…

MALICIOUS

PDF

94.3 KB Created: 2021-09-04 17:59:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 2a8d50191b58f881d1a10491e3cdd8b7 SHA-1: d142e8809986af54403850aa3dd5ae25c1ae3b5d SHA-256: 49f10e1a5764263d1048b5bd7b0f8163a07eae09779edb90ecece7e714542bfe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads and disposable hosting, indicating an attempt to obscure the final destination. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The presence of a link farm and the use of compromised sites align with techniques to lure users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

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://amirep.com/wp-content/plugins/super-forms/uploads/php/files/261bc9472aea38a4f93e462389280f3f/fomizujitowazasodame.pdf In PDF document text
    • http://arniestribu.com/campannas/file/vefobabijegegufefi.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/r95o9s2r90jnb794dv1sbqo776/kuvapetemakoterifa.pdfIn PDF document text
    • https://olgunbey.com/upload/ckfinder/files/451511492.pdfIn PDF document text
    • http://viettelhaiphong.me/data/dulieu/files/dipevuronapukefonotis.pdfIn PDF document text
    • http://nofatrans-int.com/userfiles/file/78796403633.pdfIn PDF document text
    • https://tramtron.vn/uploads/files/files/tewuvovifikurepasobaxid.pdfIn PDF document text
    • https://questyme.ca/userfiles/file/losude.pdfIn PDF document text
    • https://next-engineering.com/userfiles/files/25864157317.pdfIn PDF document text
    • http://studioprogettoarchitettura.eu/userfiles/files/66943994709.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/300635434803.pdfIn PDF document text
    • https://ipic.vn/userfiles/file/11032415608.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1607ade753da5b---73299602756.pdfIn PDF document text
    • http://kingkady.com/uploadfile/files/87746910627.pdfIn PDF document text
    • http://nelly-design.ru/upload/files/25287690930.pdfIn PDF document text
    • http://tasarimak.net/ckfinder/userfiles/files/6574147814.pdfIn PDF document text
    • https://nacituran.com/userfiles/file/damova.pdfIn PDF document text
    • http://hzbmsj.com/images/upload/File/41347224278.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ea502c37b2---34824852010.pdfIn PDF document text
    • http://houselandia.ru/files/34246627842.pdfIn PDF document text
    • https://angkalaris.com/contents/files/32199802769.pdfIn PDF document text
    • http://parejalecaros.com/adjunto/upload/fck/files/fexugireduxipamozuvezapi.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/6rcn00vm2k1cijl2ir89eiriin/75581860046.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/7fba0548c6686c4aabd07cd2f46d37dd/59145619216.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=6+forms+of+energy+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://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_off00010eea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EEA 10628 bytes
SHA-256: c5b7cf4571b51ccaf2d3e0e5dc78891a73d7a54f7b70db7f9de41146a66ab8d2
font_01_sfnt_off00012700.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12700 17488 bytes
SHA-256: 14ee86450c2d34d1f3c1aabebd6a5356e810d271dc66d5aea5e9f2bfea37a5d1
font_02_sfnt_off000154ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154EF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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