Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c14a087355638bf…

MALICIOUS

PDF

94.1 KB Created: 2021-08-02 10:53:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: a4919add4ce35397bda0af869a3b9142 SHA-1: 1f7108215cfdde62f63f0ac0f6c2675adad67acb SHA-256: 9c14a087355638bf07815d211754612d4d2ac56cf798de8fa3155dfe46efeee7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous external URLs, many hosted on compromised CMS upload directories or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded JavaScript, though not directly executable in this context, indicates a potential for exploitation if the PDF were to be rendered in an environment that supports it.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 https://smidgel.ru/uplcv?utm_term=narayana+kavacham+meaning+in+gujarati+pdf PDF link annotation
    • https://dovolena-jiznicechy.cz/uploads/67719302055.pdfIn PDF document text
    • http://hzzxtl.com/UploadFile/file/20210724135427621.pdfIn PDF document text
    • https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/c21049l6mj9nr150vfqoqqofq3/12410207371.pdfIn PDF document text
    • http://maxidmum.com/images/upload/fck/file/xuvipusuxop.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f05c879fe8---xatebifuk.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/sijexakotofejisax.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/fo49q6nv32jfub2uir1usjjetd/kudamisovewurajitunozu.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/f8c84a0b2808d2cb2767f2774d9df7c2/22370462960.pdfIn PDF document text
    • https://cape-electronics.com/media/file/zovelonewo.pdfIn PDF document text
    • http://coyada.com/up_images/up_images/45124393116.pdfIn PDF document text
    • http://mobilenmr.com/files/files/bunifojirorupurorujevebuj.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/5hi018gdav3pf41647l7dk0jf0/kopelofewuxekepeluzude.pdfIn PDF document text
    • https://feldmann-spedition.de/pics/userfiles/file/tolekeneke.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/qbljfnkkgefphep3qhntbtham1/84694365509.pdfIn PDF document text
    • https://dallaslandscapedesign.com/media/files/13322618836.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/c2575dc8592148927c5f4641da1f2ec6/60126933372.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021051612203039.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/16088b948b988f---zudafosisidufasalo.pdfIn PDF document text
    • http://webbuilders.com/files/file/64873004770.pdfIn PDF document text
    • http://fogathajtohirek.hu/fckfiles/file/joginulekiludeledagag.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607abc333c5bf---40594532973.pdfIn PDF document text
    • http://icsbc.ru/fuploader//file/39091277439.pdfIn PDF document text
    • http://stressmanagement-karriere.de/userfiles/file/57245939221.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/025d4dc194af7c893f5e6ba0c7235320/46085847638.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/1726cec2defa4ad49f5ae6e89c79cfde/foxexaterokos.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D2 4452 bytes
SHA-256: 0cb8ab2307bfc28eb70571184f3af45f092206d9dd1e83b1a7d0687bd36bc71a
font_01_sfnt_off0001086f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1086F 18620 bytes
SHA-256: 296bd41b96da72e627eb25dbb8ca078002bba3fa88fbdd597e4cbf23fdd54dab
font_02_sfnt_off000136d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00014eed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EED 11212 bytes
SHA-256: 696df2412e6842d5c515ce8e9bab3f85550a4723272df254873708c176655a39

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