Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0dfac34bd7ae52d…

MALICIOUS

PDF

88.1 KB Created: 2021-07-27 23:47:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 309e44ba3c411063f7292626b94ff574 SHA-1: 8db5b72cb9b44cbcd41e9f881f9a11560b167dd3 SHA-256: f0dfac34bd7ae52da9c1dbe88d93c5f145c2274b7e54d1993cb08c017e2140e0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to compromised WordPress upload directories and disposable hosting, suggesting it acts as a lure to redirect users to malicious sites. The PDF structure and embedded links are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f00dee83d4---wosopivalujajovixewuz.pdf In PDF document text
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/7d7268ab0bd9e61909a6282754b15ab0/sofomilapivig.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/ih1addjlbsrl8m19hgckj2eth3/54903186260.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/63aa8e3467c51447df5c4beb358f2b0a/72880102325.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608555c964a23---38997279097.pdfIn PDF document text
    • https://pacantioquia.org/aym_image/files/gedizukolelazusuxabeba.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609492fe60a47---xikudegofiv.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/a7cb2601d7108d50e7e9f2a4ec973b05/sexelapigupul.pdfIn PDF document text
    • https://oilbasaro.com/web/images/ckfinder/files/20210626065740.pdfIn PDF document text
    • http://timeyear-v.com/userfiles/file/79699846542.pdfIn PDF document text
    • https://aurorabersinar2.com/contents//files/fudazesagewigulodo.pdfIn PDF document text
    • https://projetounificado.com/uploads/files/63511365032.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a34302cfc6e---23080505854.pdfIn PDF document text
    • http://peaceinsrilanka.lk/userfiles/file/97625473340.pdfIn PDF document text
    • http://poiskvod.ru/images/file/18516571579.pdfIn PDF document text
    • https://daaeportrett.no/upload/file/32046911184.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/b8775705ebdd49bfd78e84f50142bffa/33238343831.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/e329842515656ea31f78ea304c953fca/50957830432.pdfIn PDF document text
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/469488f5e95b6b5a7cedee1eb0f6f119/zuxujapowabuvuso.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/1a81edb54c5952a5b17f683ac6b2c37f/32232008442.pdfIn PDF document text
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/f981082cdda9cdb4bf123822e09c65df/womapemufemodapokima.pdfIn PDF document text
    • https://berbagiangka.com/contents//files/bajaritujivuwarekex.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac0a102434---71347744211.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=punctuation+practice+worksheet+answer+keyPDF 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_off0000f1d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D7 18140 bytes
SHA-256: 95f6e94471e2916f6fe59597d19a7463dcfb6a39f59a26fefdfc5d92ccebdbf2
font_01_sfnt_off0001217a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1217A 10820 bytes
SHA-256: b1faff675fba922c75ced787594034344b47a163a6720731650a71c9a702f6cd
font_02_sfnt_off00013a8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A8C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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