Malicious PDF — malware analysis report

Static analysis result for SHA-256 c886c9d86838a6c7…

MALICIOUS

PDF

84.7 KB Created: 2021-09-16 13:59:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 95be0c36cde7c9df82d6976cd98cff2e SHA-1: 047a9278d68dd148df771a9ecb81fb4a6a8f4ef5 SHA-256: c886c9d86838a6c7d928d1e9a1aee29d1c2f2d112562737e2c6efd589b73ba4c
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains numerous links, many pointing to compromised WordPress upload directories or disposable hosting, suggesting it functions as a link farm. The primary purpose appears to be directing users to external malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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 http://www.musicboxpiano.com/contentfiles/wivetesupanojexipa.pdf In PDF document text
    • https://glozor.com/userfiles/file/48307064670.pdfIn PDF document text
    • http://emons-verlag.net/testarea/cwsCMSlight/media/files/xiberodiroda.pdfIn PDF document text
    • http://ville-dammarie.com/ckfinder/userfiles/files/fitawuvurefevesed.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/701efa15cc3e18081b19e6351f6e504e/mokaxavoven.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613bc1df8e0f4---palovi.pdfIn PDF document text
    • https://eqonetech.com/upload/userfiles/files/34895377207.pdfIn PDF document text
    • https://aykutemlak.com/upload/ckfinder/files/21059601842.pdfIn PDF document text
    • http://gugugroup.com/userfiles/gapemegati.pdfIn PDF document text
    • http://vevo.keresztessyoptika.hu/elemek/file/28269765151.pdfIn PDF document text
    • https://chinese-wall.tw/upload/files/wevimoreti.pdfIn PDF document text
    • http://mellorymotors.ru/admin/ckfinder/userfiles/files/61631154157.pdfIn PDF document text
    • http://rheumatology.institute/upload/content/file/17682480802.pdfIn PDF document text
    • https://aparcaderoshaddaichile.cl/uploads/images/files/wumowap.pdfIn PDF document text
    • http://style4.allwebeasy.com/userfiles/files/30683542430.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/7185869f4da7662c56991b27f0db1de2/bebubibodigidanuze.pdfIn PDF document text
    • https://balarampurblock.in/ckfinder/userfiles/files/76696479336.pdfIn PDF document text
    • http://elijasprojekts.lv/files/file/zuzedepabaluxoxumoj.pdfIn PDF document text
    • http://vicc.huh.hu/UserFiles/File/valafakupubejorolofuxafu.pdfIn PDF document text
    • http://nwhouse.ru/uploads/file/bidifu.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/6ba6031da47750489d2e0143c07e9dd9/27716420838.pdfIn PDF document text
    • http://gma.ge/admin/ckeditor/ckfinder/userfiles/files/nobivuxamexejedazomidamom.pdfIn PDF document text
    • http://machinegroup.ru/img/outer/files/98191501757.pdfIn PDF document text
    • http://huh.hu/UserFiles/File/nulazinedego.pdfIn PDF document text
    • http://infinijewelry.com/userfiles/file/43420969826.pdfIn PDF document text
    • https://kohphanganhotelandtour.com/userfiles/file/nelufularubumalixufa.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613164264c531---kuletamukimo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=jurassic+world+the+game+mod+apk+unlimited+moneyPDF 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_off0000e027.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE027 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f839.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF839 18416 bytes
SHA-256: 4371a8c52134ae887442266d724b771b4387a743f7fa220348548c3acca8bb6a
font_02_sfnt_off0001281e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1281E 11344 bytes
SHA-256: 4ea2ffb8c9639e2603e775150dfa3ad52c0a0cf238ed11fc13c3486ab517cd97