Malicious PDF — malware analysis report

Static analysis result for SHA-256 02fb80f2a9816db5…

MALICIOUS

PDF

97.2 KB Created: 2021-09-18 21:22:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: f5e01e19346a535906fb50d0bae28410 SHA-1: b803201439d9fc6312d5d1054511233b3291cc2f SHA-256: 02fb80f2a9816db5ae42be23dcee2fd5841d493dd0a182e7ae64c905dc0b9eb2
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits multiple indicators of malicious activity, including links to compromised CMS uploads and disposable hosting, suggesting it's part of a link farm designed to distribute malware. The presence of a 'password-protected archive lure' heuristic strongly indicates that the document is intended to trick the user into downloading and decrypting a malicious payload. While no scripts were directly extracted, the overall structure and heuristics point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pistant.ru/uplcv?utm_term=havoc+os+android+11 PDF link annotation
    • http://alarcon-v.com/editor_upload_image/file/13469601368.pdfIn PDF document text
    • http://speckrepej.com/upload/file/23442815349.pdfIn PDF document text
    • https://sanaspinler.com/calisma2/files/uploads/zoxiluxuzug.pdfIn PDF document text
    • https://path.mn/userfiles/files/27874139320.pdfIn PDF document text
    • http://lamelove-zakryti.cz/userfiles/file/kufusewazonitiwul.pdfIn PDF document text
    • http://aligokdemir.com/resimler/files/basajalipapunabevi.pdfIn PDF document text
    • http://everest-c.ru/ckfinder/userfiles/files/77030974933.pdfIn PDF document text
    • https://livre-art.com/ckfinder/userfiles/files/xonemifejezatikiwuzitila.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613889182a8ef---64580364214.pdfIn PDF document text
    • http://votejoedestefano.com/editorData/file/7532147383.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/vowumifapoja.pdfIn PDF document text
    • https://oasis-travel.ro/files/zabetatutowuloj.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/16139602fc8eb3---lufizive.pdfIn PDF document text
    • https://doanandieuduong295doson.vn/namthuan/images/news/files/tixarutonisis.pdfIn PDF document text
    • http://straub-online.ch/userfiles/files/70502363760.pdfIn PDF document text
    • http://sweed-trans.eu/ckfinder/userfiles/files/vufabatejoviraragod.pdfIn PDF document text
    • http://host.keraladreamhomes.com/~viswabrahmathach/admin/fckeditor/editor/filemanager/connectors/php/userfiles/file/sawiki.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/k1894q38i3afeh41vu9lgah2l6/32606592420.pdfIn PDF document text
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/gurilarubapufarivopafa.pdfIn PDF document text
    • https://twinscooking.nl/twins/userfiles/file/xidudosefokaz.pdfIn PDF document text
    • https://eetravel.net/file/81439232169.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16139595d8e3f0---53180865526.pdfIn PDF document text
    • http://oldstat.ww.tj/img/file/mejusekog.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_off000118c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118C1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000130d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130D3 17992 bytes
SHA-256: 3f6f3eef3ed195b5958ad7f049843385730b4ee30244ffecb4a2cf56f6f7ae12
font_02_sfnt_off0001604b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1604B 10196 bytes
SHA-256: cdf82ff4896d4171984bc0f35280a35c1fa3a9710abeed9bf9fb92e887ebdff1

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