Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9f81cad00cd35b1…

MALICIOUS

PDF

82.3 KB Created: 2021-09-06 21:54:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 348d02509b42e94355be3f7efea151d6 SHA-1: b3e53dcf070c56e48d128a035a78709983a1d61a SHA-256: f9f81cad00cd35b1c0c3f9d5871e37bf11a259162c598050f838bdec0d0aded0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs that point to various domains, many of which are associated with compromised WordPress uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URI heuristics further supports the attack pattern of luring users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://garglob.ru/uplcv?utm_term=overfilling+manual+transmission PDF link annotation
    • https://fablab808.com/nbloom/fckuploads/file/67392593493.pdfIn PDF document text
    • https://kiaavcilar.com/upload/ckfinder/files/dawob.pdfIn PDF document text
    • http://dakmoto.cz/obrazky/file/lumeterexiregorabik.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/db4243b34e877b2383f9da4f29190c1c/sadasulefotunu.pdfIn PDF document text
    • http://www.kingsmen-cmti.com/upload/files/17220737297.pdfIn PDF document text
    • http://weifong.tw/fckimages/file/fikodipipabosimopevusi.pdfIn PDF document text
    • http://thienlongadv.com/upload/files/13562792439.pdfIn PDF document text
    • http://solac.nl/app/webroot/files/userfiles/files/39804035782.pdfIn PDF document text
    • http://velo.hu/UserFiles/file/49833787572.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160ab6f3552119---nazoni.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c3cf2c35929---komokajalumavabidaxabelep.pdfIn PDF document text
    • http://museodegliarazzimarsala.com/userfiles/files/vitajiwegisiwolipale.pdfIn PDF document text
    • http://hanmih.com/userfiles/file/20210812230759.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/3c04db135c996787798a090ab78942be/60352332429.pdfIn PDF document text
    • http://vodnik48.ru/content/file/pagutaretozo.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16091c5bbd66ac---felixufa.pdfIn PDF document text
    • http://sanitaerprofi.ch/fckeditor/editor/images/file/82854450575.pdfIn PDF document text
    • https://sts-cct.com/app/webroot/userfiles/files/wimiwonanikuxukizogop.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/311db32e49eef6465b7546d31680f799/18962848784.pdfIn PDF document text
    • https://imagebeaute.fr/userfiles/file/59555520826.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/3c7305a6a4e3d723b01fc6937f39dbea/daraloxozo.pdfIn PDF document text
    • http://abakus-routing.co.uk/ckfinder/userfiles/files/17969677921.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_off0000de93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE93 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f6aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6AA 10748 bytes
SHA-256: c805dd83d04b84cadd8090b2f955d0fcf267672477e30c4aae653a5d35353283
font_02_sfnt_off00010f6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F6C 17016 bytes
SHA-256: 79851dd25e75b54b73829a677409228780449b25930c113ffa824cf9913b55c4

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