Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e38eda98bf978ce…

MALICIOUS

PDF

82.4 KB Created: 2021-08-21 02:43:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: f580be547426abb9ccb055d8b3e49f5a SHA-1: df7248b34c3887e1fb4c4d95ca7ce942c90e2525 SHA-256: 3e38eda98bf978cebb3c99b0a85d0a954fa4ec676ee91481e33c5a2d07d26a4e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document functions as a link farm, containing numerous URLs pointing to compromised WordPress sites, likely intended to lure users to malicious content. No scripts were extracted, but the presence of many distinct hosts and the nature of the URLs suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a30ed98a2b0---kuvizeda.pdf In PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160983dceecc9c---12054530108.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609457b0285be---78086295572.pdfIn PDF document text
    • https://pametnidom.hr/pametne_kuce/userfiles/file/jikolukew.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b8d8c66abbc---1477875794.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/89befe9c60d6f8b38ccc7ed5dda53c00/vikopezilofexesumexa.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/8c8a77679a5ecff57c9c4b688c6bde4a/72627381377.pdfIn PDF document text
    • http://coumert.com/images/file/fizatuzuzaniwoviwitibubi.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160821ef40da33---pizodafuwogadasora.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a136deb90c1---kepamawuruzafukenev.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081e03f9b3f5---zimupofuxenuv.pdfIn PDF document text
    • http://rc-modeller.se/images/file///zikuronemolumefigad.pdfIn PDF document text
    • https://nhorizontours.com/userfiles/files/21323922666.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9e47e41e4---62118849333.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160962ffb01c6a---53472949310.pdfIn PDF document text
    • https://imagebuzz.net/ckfinder/userfiles/files/terezetuvetako.pdfIn PDF document text
    • http://veterina-hrib.cz/user-uploads/files/79297972954.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160da392fd9af3---70822026561.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160976f2c11251---17353268804.pdfIn PDF document text
    • http://perlawarmii.pl/userfiles/file/taxazax.pdfIn PDF document text
    • http://artattack-concerts.de/files/file/56337136641.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/igfcscg5a72r2jgesgpb0qc904/54712341138.pdfIn PDF document text
    • https://varbackaforskola.se/ckfinder/userfiles/files/54242718711.pdfIn PDF document text
    • http://dachastyle.com/userfiles/file/27542758391.pdfIn PDF document text
    • http://willbramephotography.com/kexemotig.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=mapamundi+con+sus+paralelos+y+meridianosPDF 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_off0000d9ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f1c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C3 10784 bytes
SHA-256: 66324b99334b94d486e36345102e939e2ed734b476b307c565a0b46235438bb4
font_02_sfnt_off00010a83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A83 18300 bytes
SHA-256: 2d333c793d0693af767f8548f31b5dc25815c55c6cc17f4a39f3d5dcc5dd4f36

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