Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdefe00502280b0c…

MALICIOUS

PDF

68.7 KB Created: 2021-09-25 15:28:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 7c7d9c9a1e52c9e83f9408bb3cead3b5 SHA-1: e0203f59e38101fd743b84891876b8f0358b81c7 SHA-256: bdefe00502280b0c334e0f1275fe7798669ca5e5c0dc3bd34112459265649dca
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The heuristic 'SE_QR_LURE' also indicates the document may instruct users to scan a QR code, a common tactic in phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 https://krisoc.ru/uplcv?utm_term=aladdin+movie+watch+online+free PDF link annotation
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/3bcne5e88f0h528i8kg2nk4e9u/gotiwi.pdfIn PDF document text
    • https://ceylinpin.com/calisma2/files/uploads/viduwagafu.pdfIn PDF document text
    • http://argol-editions.fr/userfiles/file/nivenalizebenit.pdfIn PDF document text
    • http://dnepropress.net/files/file/fobepar.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134ef23e5fc7---60761112450.pdfIn PDF document text
    • https://karolinanowak.com/userfiles/file/42643783510.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16137c22886f78---750257260.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138cf9142442---74784623593.pdfIn PDF document text
    • https://vegan-eshop.cz/data/file/mudoveruwilunukab.pdfIn PDF document text
    • https://axlthailand.com/imagexx/files/392243081.pdfIn PDF document text
    • http://onestep-tokyo.com/userfiles/file/42319576735.pdfIn PDF document text
    • http://reylab.com/userfiles/file/17431303937.pdfIn PDF document text
    • https://chineseclothingonline.com/File/64987456936.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/hthcrnlm553npqqlg3q4i4dkd7/mudopo.pdfIn PDF document text
    • http://haokunchem.cn/upload/files/bonezoxijajefuguki.pdfIn PDF document text
    • http://vektorma.ru/uploads/assets/file/pafigaravozunejeragabeta.pdfIn PDF document text
    • http://valsadindustries.com/userfiles/file/19728011993.pdfIn PDF document text
    • http://maiodi.com/userfiles/files/pexazadiditipumaniwifi.pdfIn PDF document text
    • https://chulintemple.org/CKEdit/upload/files/rozuzajesonisidenaroj.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/ptoeh5brka907madspbvs0s1m2/gefuwez.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/161476f2a95216---75308937237.pdfIn PDF document text
    • https://kawanmto.com/contents/files/zujugejikalapuvekodom.pdfIn PDF document text
    • 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_off0000b079.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB079 10708 bytes
SHA-256: 148c670a96b3f71374eab129f1be3db9b864461630c66dbe39876ffa3899c221
font_01_sfnt_off0000c8d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8D4 14580 bytes
SHA-256: c6087d26a4f455829ea4ba0d3767388a987135ace357663f93167489fd851616
font_02_sfnt_off0000ed0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED0D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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