Malicious PDF — malware analysis report

Static analysis result for SHA-256 6848a34be3994db8…

MALICIOUS

PDF

96.0 KB Created: 2021-08-12 09:55:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 19a3d2b532d5ce4199882ebf467a42b4 SHA-1: a35168ed7a0dece161ead2b36a2a7371e76a6396 SHA-256: 6848a34be3994db84304be838cb99fb258a03d67638163f9138ed1e4a3dfc4d0
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, exhibiting characteristics of phishing and potentially a trojan. It contains numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of callback lure heuristics further indicates a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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=el+guerrero+pacifico+pelicula+completa+en+espa%C3%B1ol+latino+descargar PDF link annotation
    • http://uptownchantilly.com/uploads/files/fasakipatiduv.pdfIn PDF document text
    • https://meganimal.pt/site/upload/file/27261068979.pdfIn PDF document text
    • https://tigaintan.com/contents//files/97531110776.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160c5197db8479---27964875250.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/n6enagk26lun1t47gkfahl05d7/tanufek.pdfIn PDF document text
    • https://mokshadhamnepal.org/userfiles/files/41576973560.pdfIn PDF document text
    • https://dagvandearchitectuur.be/_files/file/firanuposesudodom.pdfIn PDF document text
    • https://lordoptika.hu/files/files/88421621950.pdfIn PDF document text
    • https://kamarkosong.com/contents//files/57920926233.pdfIn PDF document text
    • http://huijingweb.com/upload_fck/file/2021-7-16/20210716034758994396.pdfIn PDF document text
    • http://fatamorgana.fr/uploads/assets/file/rubebi.pdfIn PDF document text
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/a23f111bb4bb057979fdd199bd11aea8/51009707027.pdfIn PDF document text
    • http://roycraft.ca/userfiles/file/sefalizadeje.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/kck2hkj612akih6nhqtaco8ce4/46901837640.pdfIn PDF document text
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160792090d9972---karaxugekelojud.pdfIn PDF document text
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/durowunojojeko.pdfIn PDF document text
    • http://bajcsidavidfoto.com/_user/file/88184194319.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/algij1q7kghgt8ceeo67c1u7d6/82707559569.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160823f2748699---palisesotubiwugexes.pdfIn PDF document text
    • https://baohohoanglong.com/userfiles/file/putorewe.pdfIn PDF document text
    • http://meadescafe.com/userfiles/file/17816169514.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbcaeb8cb4---96456562993.pdfIn PDF document text
    • http://vstarmp.cn/upload/files/20210721_043453.pdfIn PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/65378973848182a6bc85f026ad4e5771/59667634034.pdfIn PDF document text
    • http://zetrade.cz/userfiles/file/27428944620.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/ivd58v78l6r7mt55spqi0enps6/mirujasutimalumomora.pdfIn PDF document text
    • http://ac-kenigsberg.ru/files/file/90950700892.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e5ecda9377b---73511457483.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_off00010c39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C39 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012450.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12450 11252 bytes
SHA-256: 5a422d1ac1c894adac2cbdd7179521abf3c9d2ab0c060c6c24cbd266de1ba86b
font_02_sfnt_off00013e37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E37 18800 bytes
SHA-256: c8376700225cfc851e5c24d9ed30c079ceed487a9d6e2411ab27a13951fba424

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