Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7a5486fd6ef19c5…

MALICIOUS

PDF

115.7 KB Created: 2021-08-20 19:08:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 010789e9babdfe2168ff00168a56f5f8 SHA-1: b0bea0d4c4aac850fa58f7b33d4170a8f2bda2fb SHA-256: e7a5486fd6ef19c5e5966c348213c5a3408e7e6b20c7c52f8e35ada478148651
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous links to external websites, many of which appear to be hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution campaign. No scripts were extracted, but the presence of multiple external links points towards an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160bf5686bb67b---39071560742.pdf In PDF document text
    • http://www.greddy.com/admin/common/ckfinder/userfiles/File/58156286062.pdfIn PDF document text
    • http://jagodkaprzedszkole.pl/userfiles/file/76129686371.pdfIn PDF document text
    • https://zegabilisim.com/calisma2/files/uploads/71602651053.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/8edc204c93b669986850c69e866b5526/rufodufula.pdfIn PDF document text
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/pimekexenafoxuwibele.pdfIn PDF document text
    • http://conflictfreeelectronics.com/ourprojects/chowki/UserFiles/renuka/file/28693698264.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609248750a57f---76114950556.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/43806971124.pdfIn PDF document text
    • https://yarpaket.ru/userfiles/file/79173048828.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/818d0bd32bf1f8ee7bbd875677ee4d82/natabosagizokokagijogezon.pdfIn PDF document text
    • http://noahsmarinesurveyors.ca/userfiles/file/87951693467.pdfIn PDF document text
    • http://reanda.com/jingkelun/userfiles/files/20210716095109.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/9f7cd699d081f2a7b415094734280aaf/zopawovuguwanatoxeb.pdfIn PDF document text
    • https://hoangvan.vn/wp-content/uploads/files/67042406542.pdfIn PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/f0e1705f8ab1d2788982d75cf0c18de5/79072418511.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/ajfbdveor2284j76vko71rqiid/58761782978.pdfIn PDF document text
    • http://micronforgacsolo.hu/UserFiles/file/boviwitapuliramutag.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a9846ac87d7---89081246974.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1606dcef1b1e3b---xemikolebisulelul.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d97320393c---pifojidugo.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/d43e752f0a0816b73929ef8fe111ae7f/65834551832.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b656a3490c8---54037661116.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160767e83dc02f---larebaxovenafejobutira.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=arishfa+khan+ki+shayari+video+sharechatPDF 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_off0001619e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1619E 10780 bytes
SHA-256: 0de5dfab5133559ebeb64fb27dc22a2b752c4489ec087ef0ab2680795ddd288f
font_01_sfnt_off00017a76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17A76 17172 bytes
SHA-256: c12a13d74f909485b00133d1da68d62114bbd6fef90b5c21a9455dbcd9e9e8ed
font_02_sfnt_off0001a6ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A6AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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