Malicious PDF — malware analysis report

Static analysis result for SHA-256 3102abe16e163a62…

MALICIOUS

PDF

80.4 KB Created: 2021-09-13 01:16:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 7ffb283da9ab9eb5c321c79e05ac7d5c SHA-1: d84c06a794a252ce5027bc069a3c19af88165e3a SHA-256: 3102abe16e163a62a3fb9ca04f6007820eb80b2ec359af2158459f0abfd14b34
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous links to external sites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing lure. The presence of a QR code lure further supports a phishing attack vector. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are consistent with malware delivery or phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://demirlermetal.com/resimler/files/49768635285.pdf In PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16139e4122362f---56097154661.pdfIn PDF document text
    • https://0955205219.jwa.tw/userfiles/files/domodutuje.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613e6cab079cb---viratifuxumaxi.pdfIn PDF document text
    • https://cristalparkhotel.com.ve/ckfinder/userfiles/files/58344687649.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/161314c2ca30d2---xibexikirawusitakagavopev.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134af7e3bf3f---detiripababuwesinaruk.pdfIn PDF document text
    • http://goodtraefarm.com/ckupload/files/vifexiwomuwonep.pdfIn PDF document text
    • http://spartaksedlec.cz/spartaksedlec/userfiles/file/vometofebibewuxidow.pdfIn PDF document text
    • https://traveletrust.com/basefile/traveletrustcom/files/pasazog.pdfIn PDF document text
    • http://hqshop24.com/userfiles/file/talujudiwirixuf.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16135f7b397b5e---68974500765.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/3258139e62fb9742ef639ff166044461/47959199936.pdfIn PDF document text
    • https://sanghvicranes.com/staging/media/10156666684.pdfIn PDF document text
    • http://jenistudio.com/upload/FCK/file/96603504598.pdfIn PDF document text
    • http://draftingfloorplan.com/ckfinder/userfiles/files/rurer.pdfIn PDF document text
    • https://pelicanfinancialnetwork.com/ckfinder/userfiles/files/roradekedujalem.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6a2ea5c8a084554947f254a2463fa379/34800550359.pdfIn PDF document text
    • https://ilexgold.com/app/webroot/files/userfiles/files/lakeguzasapipubasoxubana.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613580f3dd70b---rukepusevijepibipepug.pdfIn PDF document text
    • http://phutungquanghieu.com/app/webroot/files/ckfinder/files/kezoxaraporodusegajo.pdfIn PDF document text
    • http://les-dvorik.ru/userfiles/file/zezelebisotuz.pdfIn PDF document text
    • http://toflight.mobi/attachment/ckeditor/files/55a08c2de38f26465ca821e19ed7f7ad.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=default+qr+code+scanner+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_off0000d574.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD574 17724 bytes
SHA-256: 10c0030cabe35245c2051b1478c94dde05da184bdad98533b5538734eb52c519
font_01_sfnt_off00010375.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10375 10716 bytes
SHA-256: aa9b3d22f71399dd4dcbe3e7114fe5696b876e2302d6073dd5f75c6dabe02896
font_02_sfnt_off00011bfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BFE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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