Malicious PDF — malware analysis report

Static analysis result for SHA-256 48befbde065664d2…

MALICIOUS

PDF

109.5 KB Created: 2021-09-01 04:17:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 8d9c3a007de22c7095a278245e8e9099 SHA-1: 4b8314bd9d99c04fc87de8ab8cc499becb70c149 SHA-256: 48befbde065664d26485d7f75ae0e9df5adf420dde43bfca0cef411eba6eea7a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised WordPress uploads and other disposable hosting sites. The presence of 'utm_term' parameters suggests a phishing or SEO manipulation tactic, aiming to lure users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://irlanc.ru/uplcv?utm_term=the+doors+of+stone+august+2020 PDF link annotation
    • http://samtekelektrik.com/files/rirebis.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/9e8847b073817b927b8807955e04b89f/33747667677.pdfIn PDF document text
    • http://muzeumostrowiec.pl/obrazy/file/78061913968.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fc42e4698c4---32504893722.pdfIn PDF document text
    • https://grup-insaat.com/userfiles/file/wokejivabube.pdfIn PDF document text
    • http://e-hematologica.pl/users/file/65727158691.pdfIn PDF document text
    • https://tideandtigers.com/ckfinder/userfiles/files/wefikuwemewirija.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/3d561fdba3454fe4b85083b485c39f04/topawopekise.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609c2c77a89fb---84079663357.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a38a621c029---75459407241.pdfIn PDF document text
    • http://hanasushi6.com/uploads/files/11477123783.pdfIn PDF document text
    • http://www.ez4parcel.net/upfile/files/2021/08/14/68033281925.pdfIn PDF document text
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/a901bcdd4fd8946d4aae36a0e0462672/xorubonufabatadudozipogad.pdfIn PDF document text
    • http://icltindia.in/userfiles/file/taxoram.pdfIn PDF document text
    • http://smartarts.bg/userfiles/file/zukolebizog.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612e297d2a2c0---63171686352.pdfIn PDF document text
    • http://dioceseofniranam.org/userfiles/file/30247381506.pdfIn PDF document text
    • https://global-product.org/CKEdit/upload/files/xexuwu.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1610071fe86839---43409470171.pdfIn PDF document text
    • http://alltechsro.cz/files/newofobozokuzebujo.pdfIn PDF document text
    • http://eau-msu.ru/ckfinder/userfiles/files/56614833366.pdfIn PDF document text
    • https://fruzsiflame.hu/userfiles/file/53624915655.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1608c3c72a8c2e---lekat.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_off00014602.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14602 18620 bytes
SHA-256: 8ed25f4fc1631f37021807bcb02a561a4095adde9309f1f1f9b50b8e99f4fab7
font_01_sfnt_off00017693.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17693 10800 bytes
SHA-256: c9d6bb004c80e2eca2e9ca5f2e9ac3e1d046dad3da1a95e6a121d4c7df426776
font_02_sfnt_off00018f47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18F47 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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