Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c6edd1b8e04704f…

MALICIOUS

PDF

102.9 KB Created: 2021-06-26 15:46:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c9f4e83e2b7e5075a39020dd84f34251 SHA-1: b689481b9525dbdeee84009d784ab0a89dd21e37 SHA-256: 3c6edd1b8e04704f73739e0091ef387eb0742e6743c20437177f536ca95a88b7
196 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to PDFs hosted on compromised websites, a common tactic for business email compromise scams. The heuristic 'SE_PAYMENT_REDIRECT_LURE' strongly suggests the intent is to trick users into changing payment details. While no scripts were directly extracted, the PDF structure and embedded URLs indicate a malicious intent to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073d22f728de---xulifaredukenifove.pdf
    • https://alianzatours.com/imagenes/file/femubijim.pdf
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/13a7920e4099304b525a6ceafb55c819/voberojalarikogeto.pdf
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/d235915e946e3fbb8ba2bc846479e941/tilulozimuterux.pdf
    • http://tachikawa-derma.biz/ckfinder/userfiles/files/80427897753.pdf
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/339f2e035ad2f26d5e2ba9ec95034da2/kulatilumikesaloro.pdf
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4ac334c514---12234256945.pdf
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/160afaeee2c430---77758294340.pdf
    • https://uleshuzatabc.hu/files/file/ruzekig.pdf
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa4145ac7bb---detivixuwenemajowubesik.pdf
    • https://carparts-fixture.com/file/file/bugawupo.pdf
    • http://tamker.hu/userfiles/file/sukalaxerivazibi.pdf
    • http://bluecars.pl/userfiles/file/73196793327.pdf
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/nc115k3g7mp60qfjrfsl8pc7ka/posikiziw.pdf
    • http://cathayred-csr.com/img-cathay/files/40984349020.pdf
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/866b2804c4b12279f475a085ffa00441/ruwezosezetipovuxatap.pdf
    • http://geoplan.su/userfiles/file/47337412011.pdf
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/daiqros56btvf5034jvm6if5ma/50595723529.pdf
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/1e075b5a3e8bffeecb869acead00c299/lesavetitod.pdf
    • http://elcampoeco.org/FCKeditor/file/59946996754.pdf
    • http://zdrowejaja.com/Upload/file/kiranaxapavetunev.pdf
    • https://residenciasanamaro.es/userfiles/files/70838096931.pdf
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/84ee19bd31986112d8ba3a4cee5a70e0/liwapusonijutosukojedot.pdf
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160984f2ea7a99---balujavuroguzegolama.pdf
    • http://airholic.com/UpFiles/WebEditorFiles/file/vonarojoxubusurekeweru.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=things+that+transfer+energy+by+sound
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012c1a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C1A 16792 bytes
font_01_sfnt_off00014431.bin
0a24ab034b754cb5d38f4d059493f51df9b6d59ac766d7270da743432ead4979
pdf-font-stream PDF embedded font (sfnt) at offset 0x14431 10904 bytes
font_02_sfnt_off00015d2c.bin
7ddaffcc0d28972029fe3e7c594856f73c35d0a144132c0555a885f78dc16e86
pdf-font-stream PDF embedded font (sfnt) at offset 0x15D2C 18528 bytes