Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c56c471a17a3238…

MALICIOUS

PDF

85.9 KB Created: 2021-09-15 16:50:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 4f5a0a5197cc1cea5b4d26210c0dcdaf SHA-1: a54da026d387fb32d4db4f442d279c05f84f5b24 SHA-256: 6c56c471a17a32381a9dde5bc980389dc3c75f43ad13fd1014ce4b286bb24a23
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The file is a PDF document that contains numerous links, many of which point to compromised websites or disposable hosting. The 'SE_PAYMENT_REDIRECT_LURE' heuristic indicates the document's content likely attempts to trick users into changing payment details. The ClamAV detection and ML classifier further support its malicious nature. No scripts were extracted, but the link farm and lure suggest a phishing or credential harvesting attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://www.wiz-fac.com/uploadImg/file/6308589551.pdf In PDF document text
    • http://unityproductions.com/upload/files/ledizosonurapesikegulekon.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/4970b61ff0603b0cec6eacd5fa7e9bbc/24457836872.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613b492d872bf---kedomopisu.pdfIn PDF document text
    • http://thienlongadv.com/upload/files/kedik.pdfIn PDF document text
    • http://119pump.net/d/files/559696328.pdfIn PDF document text
    • http://whuntex.info/userfiles/file/zatoluzosazu.pdfIn PDF document text
    • https://signos.larrialdiak.es/files/galeria/files/51408431925.pdfIn PDF document text
    • https://karapinler.com/calisma2/files/uploads/bepetajofizukugu.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/zafapogusijupuweruguros.pdfIn PDF document text
    • http://z500.si/files/81638672900.pdfIn PDF document text
    • https://oglethorpeclub.org/~oglethor/UserFiles/file/lujan.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/a2ea43c1be004f7bfeaf4b5f5521c5e2/wokefosaxodog.pdfIn PDF document text
    • https://regionalhealthprogramsww.com/images/file/vadolulesuwefukanesanuna.pdfIn PDF document text
    • http://xn--939a66v0zjo3bcvdmrp.com/data/ckfinder/files/miburixelomaniwifunu.pdfIn PDF document text
    • https://kirmatas.com/userfiles/file/15391115403.pdfIn PDF document text
    • http://xn--80aafmoni2biho.xn--p1ai/admin/ckfinder/userfiles/files/bovijoveg.pdfIn PDF document text
    • http://daming-school.com/userfiles/file/lexaxexarepozixator.pdfIn PDF document text
    • http://chromavials.com/d/files/4376681185.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/e74v2bdlqjhajm2vpfgt2c50k8/92341984930.pdfIn PDF document text
    • https://rh4-h1tapi-turbo.com/contents/files/27592739400.pdfIn PDF document text
    • https://network-italia.com/file/53517483502.pdfIn PDF document text
    • http://signexpowholesale.com/project-new/christianbook/upload_images/file/zarojoj.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c39bf51ff9---bimoxulobagalopukilewow.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=how+to+send+ringtones+from+iphone+to+androidPDF 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_off0000e4e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E8 20040 bytes
SHA-256: 4e62e9052b58714203482b4a114b2999403a1240d3880d97baf92fbab520895d
font_01_sfnt_off00011829.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11829 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013040.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13040 10976 bytes
SHA-256: d755f1bb45ac8805257fee113e6bdde5b3aad5aa15d9653eef6773e65b08ddd7

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