Malicious PDF — malware analysis report

Static analysis result for SHA-256 62748281f2ff2853…

MALICIOUS

PDF

69.5 KB Created: 2021-09-13 15:32:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 985696832f189076f0aec9e464608581 SHA-1: b404bf8fa87dea3132c17ac1b6d12f1df07f056c SHA-256: 62748281f2ff2853398b6708a74597f5bf3c05ca85ff83cc3af9742b5ce95c28
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its image-only nature and embedded links pointing to external websites. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded links likely lead to further stages of the attack, such as credential harvesting or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://smidgel.ru/uplcv?utm_term=how+to+see+private+account+followers+in+instagram PDF link annotation
    • https://officialbacknumber.com/editor_up/lafewefure.pdfIn PDF document text
    • https://www.bmo-agencement.fr/ckfinder/userfiles/files/26482840793.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/r2kgo2q0u0qnc1e1o10nc6n4m4/ravopamipenegunukepol.pdfIn PDF document text
    • http://palakkadtourism.in/ckfinder/userfiles/files/70100465651.pdfIn PDF document text
    • https://pmapmc.com/userfiles/image/files/13286261735.pdfIn PDF document text
    • http://cascinamana.it/userfiles/file/joganulerizedev.pdfIn PDF document text
    • http://itagqatar.zajeltel.com/itag/file/files/bewejulunanamopekowuma.pdfIn PDF document text
    • https://sainaudit.mn/File/vowodesajoze.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/622ae64dbae100b5ccf875fc1a32555d/44474442006.pdfIn PDF document text
    • http://fkm-lux.by/var/upload/file/livasaxa.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16137d84042074---5629823624.pdfIn PDF document text
    • http://toanthinh.vn/webroot/img/files/dexetokixuwetusowoworenil.pdfIn PDF document text
    • http://refpecsbelvaros.hu/kepek/files/98372854623.pdfIn PDF document text
    • http://n2nlah.org/UserFiles/file/23723126951.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/3d05cdba18288536c8b7c684047de30b/57708537101.pdfIn PDF document text
    • http://rebeccaosborne.com/uploads/43080630907.pdfIn PDF document text
    • http://fitviewer.com/files/file/88837886248.pdfIn PDF document text
    • https://tatvan.in/userfiles/file/bavikugegipupesamixus.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/2760850915.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/8vqt3g08lc0oif95s7a5asp3v2/rufagokug.pdfIn PDF document text
    • http://righetti-ticozzi.it/userfiles/files/miwipixuwatasidumaj.pdfIn PDF document text
    • http://dobre-jaja.com/Upload/file/16988555423.pdfIn PDF document text
    • http://ty-universe.com/image/files/20210902_203010.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_off0000b35a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB35A 14012 bytes
SHA-256: ca23a1c6148eb452d2852a8a3c3054438207a40c9ad03a11e95f4c1b06ac5d46
font_01_sfnt_off0000d601.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD601 11068 bytes
SHA-256: 736bb1dd0e706903600e8ff85f9855c3edf10550d0556462bdecc12beb0ce17f
font_02_sfnt_off0000efd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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