Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f69f2addea615ce…

MALICIOUS

PDF

81.7 KB Created: 2021-09-19 04:15:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 8c08b895968ca7f3ec3bab9480fb5135 SHA-1: d90b6358d9bed19f3cc730ac6ec505c3b482d4b6 SHA-256: 0f69f2addea615cef52e007916a0576f4e70cb822c39677712eef978d59ef1bd
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, some of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The heuristic 'SE_URGENCY_LURE' suggests the document content attempts to create a false sense of urgency. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://krisoc.ru/uplcv?utm_term=my+phone+wont+let+me+send+pictures PDF link annotation
    • http://tsg-edinstvo.ru/userfiles/file/libubesajinap.pdfIn PDF document text
    • http://indcms.testingmachines.com/images/file/20358203348.pdfIn PDF document text
    • http://laibros.com/ckeditor/userfiles/files/89296253021.pdfIn PDF document text
    • http://box8websites.com/ckfinder/userfiles/files/dizerumom.pdfIn PDF document text
    • http://p-jtech.com/userData/board/file/muziwowepufexixajogimo.pdfIn PDF document text
    • http://m-s-g.ru/userfiles/files/loboleven.pdfIn PDF document text
    • http://cimkezes.hu/uploads/ckfinder/userfiles/files/44766905008.pdfIn PDF document text
    • http://denki-shonan.com/uploadsfile/68740430249.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/478147df6f93b92ab8aae0baf78d7e5c/78293808656.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/16144a4c3020c7---61494918992.pdfIn PDF document text
    • http://abakus-routing.co.uk/ckfinder/userfiles/files/sexedorelotumimelafa.pdfIn PDF document text
    • https://cartolmania.it/file/1815050773.pdfIn PDF document text
    • https://e-uchebnici.com/img/file/ditudenito.pdfIn PDF document text
    • http://status-go.net/gfx/userfiles/files/muzudixa.pdfIn PDF document text
    • http://loca-granderoue-montaletang.com/ckfinder/userfiles/files/32253244328.pdfIn PDF document text
    • http://namjapizza.com/app/webroot/files/15882461042.pdfIn PDF document text
    • http://salukool.ee/upload/userfiles/file/28997280638.pdfIn PDF document text
    • http://855solution.com/htdocs/cljr/data/files/44737164752.pdfIn PDF document text
    • https://gilbertems.com/videos/file/63498794934.pdfIn PDF document text
    • https://gites-les-bardots.com/userfiles/file/73540927208.pdfIn PDF document text
    • http://soeurs-scjboran.fr/soeurs/upload/files/bulokarezedobagafofatimej.pdfIn PDF document text
    • http://ventmetal.ru/userfiles/files/tukoviratakixilubavuji.pdfIn PDF document text
    • http://labellebeaute.com.hk/ckfinder/userfiles/files/76109390360.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16137ba825aeeb---zudipiwepiv.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16144e79e74775---38143415248.pdfIn PDF document text
    • http://www.ciesol.com/ckfinder/userfiles/files/ditosozafugorapigoxozubog.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_off0000d8d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8D4 10908 bytes
SHA-256: a0dcd78a93a3aeb6cf76e47ccbf47a783d0b14369d14c2c49f1b0e124d12218d
font_01_sfnt_off0000f1ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1ED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000109ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109FF 18172 bytes
SHA-256: 1b11556473c5affaca72dcb3dd4b46458bd8d9e5d59c73e8e9756b9d6f7eff67

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