Malicious PDF — malware analysis report

Static analysis result for SHA-256 e725c770c60be82b…

MALICIOUS

PDF

87.9 KB Created: 2021-07-01 11:30:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: d79eded7e46f0959d269c7bb461e28d9 SHA-1: 59c9444a598bb2621f9b02ebf884a1eb5165b393 SHA-256: e725c770c60be82b4a1cfe11e7623f945c7cfdae1ef3b7fa92cef61d5caf5446
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised websites and disposable hosting, indicative of a link farm used for phishing or malware delivery. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of external URIs and link farms points towards a phishing or credential harvesting attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://bouncebodysupplements.com/newerac2c/userfiles/file/vipoxizetebal.pdf In PDF document text
    • https://daismene.it/file/37854215003.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/2ce93365d7e247383ef7057697b495eb/ridefuvozokexe.pdfIn PDF document text
    • https://bselink.com/userfiles/file/sazuparokegiju.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077d3a81e2de---xezexenexofakoxopulovewej.pdfIn PDF document text
    • http://euredit-editions.com/userfiles/file/77435084433.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd47fa0329---93233101104.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/50193582698.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16089714160565---49442984441.pdfIn PDF document text
    • https://sunarchegypt.com/userfiles/file/17075991878.pdfIn PDF document text
    • https://ytdrive.com/CKEdit/upload/files/37349131581.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160785532d77f9---duzuworakerodikewobovuw.pdfIn PDF document text
    • http://rkmaster.ru/uploads/files/jozelebisixakux.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/f305b92cab041763c0c87d6494fdaef7/25676017120.pdfIn PDF document text
    • http://cascinamana.it/userfiles/file/gidosolojikuzufilos.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160894113df354---rubal.pdfIn PDF document text
    • https://aymsoft.us/aym_image/files/lugokanogalivubejo.pdfIn PDF document text
    • http://kozszemle.hu/uploads/files/80470582821.pdfIn PDF document text
    • http://osheamaloneynylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vekitomeketoluweton.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/b1b7c79615812f85e92590af381b7cef/15670661463.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/31697915008.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f84d715c18---52576996249.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bf9449916f---6169117671.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/debmenmd7slbs42rrkj5lkqc85/mugikupubited.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/8ef711a2d7cb11f298296d7e0c69a913/45376948714.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+connect+nintendo+switch+to+windows+10PDF 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_off0000f387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF387 10408 bytes
SHA-256: b05564ef6e8c58dde0da3fce4a7b4889a0b1c3cf926753c846b683f1345cf948
font_01_sfnt_off00010b16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B16 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12328 17192 bytes
SHA-256: 9fb27e8d26f74aac77fc90637ee84dd6ce2b0645ff80d82b3ca48484e41ef9ad

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