Malicious PDF — malware analysis report

Static analysis result for SHA-256 327029f66482c16f…

MALICIOUS

PDF

87.4 KB Created: 2021-07-27 14:03:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: edbc5bf3516303e9ef50fad52fdfd12c SHA-1: 2fd0432dc2f2b2467d354f74654250c424c9c43c SHA-256: 327029f66482c16fd92ed048e9d57fdd1ac30a9b17f23b11624459603cdf28f8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous links pointing to compromised WordPress sites, which are likely hosting further malicious content or redirecting to phishing pages. The presence of these links suggests an attempt to lure users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b1d474b5f26---zotuvukavi.pdf In PDF document text
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/6a2eb0837a1a6de67df35c8eee5f5709/pogalukeba.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ceb1b0c39aa---49420375604.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/7d0f43019db2da04b3869e6e7dc1d82e/45373210423.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/f7c064fd822ec0ed5a1535c2997f523a/83742707267.pdfIn PDF document text
    • https://mytalk7.com/_UploadFile/Images/file/47918240698.pdfIn PDF document text
    • http://tetobox-budapest.hu/uploads/files/47308933335.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/4trhrcbtleseujt9dmotsk8s4g/7396313254.pdfIn PDF document text
    • http://ebsenglish.net/_UploadFile/Images/file/8862789779.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e2f088f31---dakekokazuvosubemomamebuz.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/0132747021b148a43ed731bab2847123/nisurigetuwitota.pdfIn PDF document text
    • https://asiarsolutions.com/userfiles/file/76433184802.pdfIn PDF document text
    • https://binarbaidfabrication.com/public_html/userfiles/file/35495223254.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/qikr9ia8jpn48p6aj0qscibh83/79077421794.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079ec91a43e3---68693577515.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/16075a6527d435---81124107741.pdfIn PDF document text
    • https://ddms.tw/upload/ckfinder_temp/files/20210705145937.pdfIn PDF document text
    • http://aps-mes.com/files/file/tatevul.pdfIn PDF document text
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/9mraj8o639vp8097qda312t2i7/54018638133.pdfIn PDF document text
    • https://madopin.com/calisma2/files/uploads/lijikoposi.pdfIn PDF document text
    • http://www.cbs-emballages.com/upload/file/wixurodoxemat.pdfIn PDF document text
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/8pd8vqogao9q9kfc5p0p2s8of4/bawimibuvonom.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/16hioo14ujdup1kikfuh6crp6t/dipetemaloxuzabe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=how+to+run+python+3.8PDF 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_off0000f1d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D5 10484 bytes
SHA-256: 3135ac63faa15d86d967c7ed1f9f9dfe9be288d7af03b68fb3eb06dde2df2781
font_01_sfnt_off000109a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000121bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121BB 17600 bytes
SHA-256: b21a4398fbec41cb8608fd2e51039ccf3fa5575ba0fe0135efb6460093023e8a

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