Malicious PDF — malware analysis report

Static analysis result for SHA-256 baf2895232c20de8…

MALICIOUS

PDF

84.7 KB Created: 2021-09-02 02:27:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 13d717f3710b0af06fb3559d457557cb SHA-1: abcdced1e3c4b2763323251b12e68803fcb5dcf9 SHA-256: baf2895232c20de8a32657872500dbe7eab9a70c50b2842ca7255a8a42c9b7c9
156 Risk Score

Malware Insights

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

The PDF document contains a large number of links, many of which point to compromised or disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious websites. The document body is heavily obfuscated and does not provide direct instructions, but the presence of numerous external links is the primary indicator of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://malayalamfoundation.org/admin/my_files/file/77987931762.pdf In PDF document text
    • http://bowenlawmt.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/51207519517.pdfIn PDF document text
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/0v8h82p29s9p3sld53m0n5995j/68086119251.pdfIn PDF document text
    • http://kingsbrite.com/kingsbrite.com/userfiles/file/rimuxozezaza.pdfIn PDF document text
    • https://chambredhotes-savoie.com/ckfinder/userfiles/files/zulaxal.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/863caf9acffd24c029590c6b83fb2260/pewinumixelirekax.pdfIn PDF document text
    • http://businessvaluationapp.com//fck_files/file/doveru.pdfIn PDF document text
    • https://mylin.in/ckeditor/ckfinder/userfiles/files/kezub.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1607c4e67bca55---67866707377.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/81c1af39c420df62052271aad184a8f4/96734471664.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160738a00748dd---samafen.pdfIn PDF document text
    • https://travellifeafrica.com/ci/userfiles/files/55666472141.pdfIn PDF document text
    • https://granitabrasive.com/editor_up/pezanifimamulanilo.pdfIn PDF document text
    • http://rungrawin-itt.com/userfiles/files/nukotab.pdfIn PDF document text
    • http://stilna-ya.com/_userfiles/file/37114815405.pdfIn PDF document text
    • https://eyetracking.pl/userfiles/file/83263837200.pdfIn PDF document text
    • http://denda.co.kr/ckfinder/userfiles/files/46436942517.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/ranolujil.pdfIn PDF document text
    • http://begemot-rus.com/uploadfiles/file/2021070913434173499.pdfIn PDF document text
    • http://sherwoodchambergolf.com/ckfinder/userfiles/files/36668312187.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a11cf37f611---nevuboze.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/423nshg5f1smgt3rdt1o1ov1ek/95273068027.pdfIn PDF document text
    • https://www.delaneyllc.com/ckfinder/userfiles/files/48021661377.pdfIn PDF document text
    • http://tupnate.com/ckfinder/userfiles/files/rugatonuwiteguziriliz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=meaning+of+espanol+in+spanishPDF 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_off0000dabd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDABD 21280 bytes
SHA-256: 1112188a4c6df9ab575d0e5fe0781e80e888bd44182733a6ff5121752a157077
font_01_sfnt_off00011299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11299 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012ab0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AB0 10432 bytes
SHA-256: eda83392a40953c6c3ad0534e7fdaa5b3cac55ba9d96c9713e9b9345bfa57883

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