Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbfc1ca53ff8a78d…

MALICIOUS

PDF

79.4 KB Created: 2021-09-13 19:55:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: b406f28c98a0d155a83d5d404c219444 SHA-1: eba76440eb77ead3a5d9e015c96dcd52f5733382 SHA-256: bbfc1ca53ff8a78dc5cd8854c4e3b4f7f602ba368002c08b1b9abd749307a037
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains numerous embedded URLs pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. While no scripts were directly extracted, the nature of the embedded URLs and the detection names point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a73a240d20---xipigunilijujalitivan.pdf In PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/161360a0159349---dibatesaxadalepu.pdfIn PDF document text
    • http://xn--9i1b14lzokxjcrti5um.com/upload/fckeditor/file/bumebosewirebe.pdfIn PDF document text
    • https://itracmediav5.com/ckfinder/userfiles/files/19816645589.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/db4eee0b8c7f7c0fdb925ae375e6e829/beguvofinimaxofosas.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/db0c00773a1f31bd3c7b19ca895affdb/duzese.pdfIn PDF document text
    • http://designbeginnings.com/upload/file/borixulonofa.pdfIn PDF document text
    • http://biomax.shop/filespath/files/20210911081319.pdfIn PDF document text
    • http://vouchertiket.com/airplane/ckeditor/uploads/files/63235849835.pdfIn PDF document text
    • http://sgpeo.pl/users/file/rizipuninuguturepazus.pdfIn PDF document text
    • http://kraemer-duennebacke.de/files/file/xefopisejufu.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/c8c672875c5145c7f4aa2b31d182b667/42770949284.pdfIn PDF document text
    • http://www.dawnrotaryclub.tw/UserFiles/files/86489338552.pdfIn PDF document text
    • https://arrad.ch/modules/ck/ckfinder/userfiles/files/fasorifilim.pdfIn PDF document text
    • http://www.grupoaccs.net/ckfinder/userfiles/files/25068076405.pdfIn PDF document text
    • http://nsmpublicschool.org/slbdavbatala/userfiles/file/fivakosujolodijenebuvi.pdfIn PDF document text
    • http://www.saveurspoitoucharentes.com/admin/ckfinder/userfiles/files/lazax.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/nisas.pdfIn PDF document text
    • https://belitour.ir/basefile/belitourir/files/giratamijujedulowofo.pdfIn PDF document text
    • https://anjingliar.com/contents/files/rewawazonagi.pdfIn PDF document text
    • https://promptcorporate.com/ckeditor/ckfinder/userfiles/files/88458792161.pdfIn PDF document text
    • http://odnoklassniki-files.ru/images/uploads/files/53154445311.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/fudipigidugukipividevetoj.pdfIn PDF document text
    • http://tnetimes.kr/upload/file///somus.pdfIn PDF document text
    • https://mmgrowersg.com/ckfinder/userfiles/files/45065228815.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=android+developer+fragmentsPDF 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_off0000c6dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6DD 21200 bytes
SHA-256: a978b4f0aca97424fc94a977b3a33516909f6a873595f4cbe42ab8fbb64ff64a
font_01_sfnt_off0000fe5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE5C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011673.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11673 10888 bytes
SHA-256: 739705ef5fd19959ca4d2335105e34d8ac4272c136de3629f7e379ace1ccb54f

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