Malicious PDF — malware analysis report

Static analysis result for SHA-256 95c03b705a3cb6aa…

MALICIOUS

PDF

89.7 KB Created: 2021-09-24 05:13:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: a80293bd994990a7fdf7a9c683d115d5 SHA-1: 9b0b97705554dad14a9bfb1640a671e215ab50ae SHA-256: 95c03b705a3cb6aa907a1ddbb614157496dd0d6c5d6a9f0e898776407aa1bc36
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The embedded URLs and the overall structure indicate an attempt to disguise malicious content within a seemingly legitimate document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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://maisonforville.be/documents/file/59204606220.pdf In PDF document text
    • https://ipekyolumedya.com/resim_galeri/file/45697154902.pdfIn PDF document text
    • https://francois-daulte.com/ckfinder/userfiles/files/lalenoju.pdfIn PDF document text
    • http://sriraghavendratemple.com/ckfinder/userfiles/files/63508127528.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/35ij35q7oop1r0orefc4hhhvdn/15829208031.pdfIn PDF document text
    • https://palet-school.com/files/files/50494480358.pdfIn PDF document text
    • http://hamyarsanatco.com/ckfinder/userfiles/files/vikofugebufinozasoz.pdfIn PDF document text
    • http://ibarugi.com/fckeditor/userfiles/file/welozumixupixipe.pdfIn PDF document text
    • https://wasael.com/userfiles/file/dobik.pdfIn PDF document text
    • http://ktai.lmg.jp/upload/file/20488578014.pdfIn PDF document text
    • http://trunglamdecor.com/uploads/userfiles/file/wilopedelaj.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16146acb348346---wazafutaxepewibisifaxit.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/9f51bef5ff7145b947a7a647cebca035/mekaminuwujaja.pdfIn PDF document text
    • http://ambiance-cinema.fr/wp-content/plugins/super-forms/uploads/php/files/e34e30e69eedaca36113f5f17e3e9488/78809644085.pdfIn PDF document text
    • http://195exim.com/datas/files/64274582535.pdfIn PDF document text
    • https://ljlconst.com/admin/images/file/57669504478.pdfIn PDF document text
    • http://csc020.com/userfiles/file/20210903101950_56khba.pdfIn PDF document text
    • http://grupopiscis.com/upload/files/13679618133.pdfIn PDF document text
    • http://3wsystems.com/shipinc/userfiles/files/60362296763.pdfIn PDF document text
    • http://myucpb.com/userfiles/file/zadazegegipibuwesisunolu.pdfIn PDF document text
    • https://www.truck-transport.com/ckfinder/userfiles/files/retagasetebuwuzuvas.pdfIn PDF document text
    • https://telorgabus.com/contents/files/xetitesafi.pdfIn PDF document text
    • https://ville-saintleonard.fr/pdf/tutaboparesiwu.pdfIn PDF document text
    • http://ajeah-intl.org/fck_image/file/2870886028.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=calculator+for+power+supplyPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e059.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE059 10608 bytes
SHA-256: c6cd1cddf674eac6cf1944701a6c18f2ba149a15436c0121d4f9e6d40b642926
font_01_sfnt_off0000f8e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E8 17416 bytes
SHA-256: e02512740206d78686bb336296e704bc9ce6c8d6a46f2390c8cca8d8d9442251
font_02_sfnt_off00011344.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11344 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00012b56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B56 17532 bytes
SHA-256: 21f8026d9cf7911bb2aa0c99392f01643e16380a95707b8ffd0f65a8c045aa74

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