Malicious PDF — malware analysis report

Static analysis result for SHA-256 d174d0280bed9ad5…

MALICIOUS

PDF

95.1 KB Created: 2021-09-01 13:34:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 430c3388d6bbe9625b57c5d72c760292 SHA-1: 3dbcd063417579647229c457bce1839efad1beaf SHA-256: d174d0280bed9ad5e90b81ce4edd580962d9662d789f9c4ffbcb4fe76e899ab3
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan delivery mechanism. The document functions as a link farm, containing numerous URLs that point to compromised WordPress sites and other disposable hosting, likely intended to redirect users to malicious content or phishing pages. The presence of 'cmd' in the document text suggests potential command execution or obfuscation techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/e7nsdugk83rsav6vq7p4vg43kp/78320485348.pdf In PDF document text
    • http://juditphotography.com/picture/userfiles/file/vuzikipafujasutosiz.pdfIn PDF document text
    • https://arredamentigiacobbe.it/file/95246542246.pdfIn PDF document text
    • https://mandarinusa.com/userfiles/file/1627652547.pdfIn PDF document text
    • http://dungcumaymoc.com/Images_upload/files/73820965555.pdfIn PDF document text
    • http://elyriacatholic1970.com/clients/7/79/79c6984f8945646ae1b55d50a6b4dbab/File/vekunebofebuk.pdfIn PDF document text
    • http://scherzerpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tajadizakudefawazomupo.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a04a2a4ff17---11427974731.pdfIn PDF document text
    • https://sandzak.best/wp-content/plugins/super-forms/uploads/php/files/9f6503d81b33dbcf622b0066adf0d5cd/xiradufinikof.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/gh9u0b5ge4kg92g0vn4ckdlpn0/33518167694.pdfIn PDF document text
    • http://hopkinshigh62.com/clients/7/77/7764523e397120ad9b09b1da26998858/File/55951706405.pdfIn PDF document text
    • http://sushrutproctology.org/ckfinder/userfiles/files/56693713207.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/4rkpvicon82kjrcb922g0ildn6/rilalek.pdfIn PDF document text
    • https://maspacientes.es/wp-content/plugins/super-forms/uploads/php/files/cmd41neo10jltgte8a93vlblgn/62143182055.pdfIn PDF document text
    • https://gppacdatabase.net/userfiles/file/kodefisejenikonofos.pdfIn PDF document text
    • http://www.alcera.ca/userfiles/file/73887154832.pdfIn macro / runtime command snippet
    • http://lesmashclub.com/imgUpload/files/fewazobopo.pdfIn macro / runtime command snippet
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1d8233e1fc---xagabetejejedal.pdfIn PDF document text
    • http://sanitaerprofi.ch/fckeditor/editor/images/file/jujetalowunowalo.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/38a1a0f0b4132adaf3971bf9e87ada6a/nuseta.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/954b34036c794b2bfe2e707ac7760cf5/zelaxovuwatamajumotog.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/16080ec1bcf9e2---mimokokewomegir.pdfIn PDF document text
    • http://jingchengs.com/jingchengs/ckfinder/files/20210701152730.pdfIn PDF document text
    • https://gppacdataIn macro / runtime command snippet
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=how+to+stop+worrying+if+your+boyfriend+is+cheatingPDF 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_off00010ce4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CE4 18608 bytes
SHA-256: acd0841cee55cf910c516e04b2da7c5b242de6cae4c4f7e617da69ac63a323ab
font_01_sfnt_off00013c2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C2E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015445.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15445 11284 bytes
SHA-256: 38afe22a26fe1957adcf04d459fd09155548c027227297e4d0aebbe757b45da9

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