Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ce89a83c0f4c1ec…

MALICIOUS

PDF

71.8 KB Created: 2021-09-13 17:45:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: caab5521cbeddde1f9f184ed47db7548 SHA-1: a74abe516125bd17b0793a488585acd24a1564e6 SHA-256: 8ce89a83c0f4c1ec56cd72d5257767d7adfc093c6681028df786b6cf4a053957
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm hosted on disposable domains, a common tactic for phishing or distributing malware. The presence of multiple PDF-specific heuristics, including a compromised CMS upload link and SEO link farm indicators, strongly suggests malicious intent. While no scripts were directly extracted, the overall structure and URL patterns point towards a phishing or malware distribution 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 https://newcar-rental.com/uploads/files/202109090211477587.pdf In PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16138127d99aee---20882896325.pdfIn PDF document text
    • http://eska-lift.ru/userfiles/file/18891951349.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/phtg8fjovimjgn11anuc4e0l8m/rekakudeb.pdfIn PDF document text
    • http://tagsu.com/attachments/fckattachments/file/69181370532.pdfIn PDF document text
    • http://medical-1669.com/userfiles/files/tibilimif.pdfIn PDF document text
    • http://learningkey.org/userfiles/firifitajilozusenug.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/16a06fd39d1540287ac06bfb67c15eec/4469682087.pdfIn PDF document text
    • http://czyxchem.com/upload/files/jeraperidasa.pdfIn PDF document text
    • https://my-natural-style.net/upload/files/21995096726.pdfIn PDF document text
    • http://scantech3d.com/files/rivolex.pdfIn PDF document text
    • https://benmoonpharma.com/userfiles/file/46253219212.pdfIn PDF document text
    • https://lawyerupsmart.com/tempimg/file/wunodubusenifegi.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/u4ngfe0l5jobmmhj3c9n3823a6/mozerubefojunu.pdfIn PDF document text
    • http://www.taylormadetc.com/siteadmin/ckfinder/userfiles/files/kebifuzukawi.pdfIn PDF document text
    • http://another-partner.morefriendship.com/upload/files/70473703520.pdfIn PDF document text
    • https://rwd1.thadv.com/upload/files/56645216100.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/d3cdfb86a91e66d5d07c8b000bf76e19/josixodifelijemidoxet.pdfIn PDF document text
    • http://cn-junsheng.com/upload/file///202193194699482.pdfIn PDF document text
    • http://rebizplus.com/userfiles/file/daxen.pdfIn PDF document text
    • http://hutnia.pl/userfiles/file/94221340734.pdfIn PDF document text
    • https://questyme.com/userfiles/file/58183627576.pdfIn PDF document text
    • http://2017.letnifestiwal.pl/ckfinder/userfiles/files/45971133827.pdfIn PDF document text
    • http://csc-020.com/userfiles/file/20210908212755_8uf3dx.pdfIn PDF document text
    • https://mpksieradz.pl/upload/file/daxet.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=download+sticker+maker+premium+apkPDF 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_off0000b98c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB98C 15088 bytes
SHA-256: 916a4934c0baa8581943aea900f238e916e6ff851d41b4e4082d8e13ad5ca5fc
font_01_sfnt_off0000dfa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA6 10952 bytes
SHA-256: 53fd6c6735b01b7abdef8031ec0fd47d1105fc0e4b76365ea044301b531af945
font_02_sfnt_off0000f91a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF91A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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