Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e3cd1c2370afb7b…

MALICIOUS

PDF

347.3 KB Created: 2021-07-26 03:23:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 36690666d894cb8ba1912824eed26e54 SHA-1: 3cfc188f4b910f11d2a201deee928f2539e835f9 SHA-256: 5e3cd1c2370afb7b8f9ddc945bae8163736dbd440de2caf86ce32a42b88ad35e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. The document contains urgency lures and callback phishing elements, suggesting an attempt to trick the user into interacting with embedded links. Several URLs pointing to compromised WordPress sites were extracted, likely serving as landing pages for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9871

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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 http://timelessmebel.ru/wp-content/plugins/super-forms/uploads/php/files/8631ddca668c245267dedd67acaef86e/jebazov.pdf In PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfad63d4d1c---17546893426.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/20bce76cab2b6b8047c5b23ce70fc415/motugofokenimew.pdfIn PDF document text
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16073e6b8eb133---40576432723.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/c6a19679f9bbc7a20401c5a4582c99a9/61306363161.pdfIn PDF document text
    • http://vtvxm.vn/userfiles/file/tedofavasiror.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/oddjspnb5ep7v3ombm95onvvi2/99098539321.pdfIn PDF document text
    • http://www.buildingmalawi.com/images/uploaded/documents/9257652723.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dfda90042f0---fajetemobexobitizo.pdfIn PDF document text
    • https://rsun.pro/admin/ckfinder/userfiles/files/talazajikududefora.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160bfa381d3cf2---jegex.pdfIn PDF document text
    • http://fhhsclassof70.com/clients/4/42/42ce21dc30e429aa976ba070b22ccf93/File/pukofomabokujaxewogevewu.pdfIn PDF document text
    • http://creative-format.com/upload/editor/files/21686048550.pdfIn PDF document text
    • http://turagent007.ru/userfiles/file/fenatexogoxajatefev.pdfIn PDF document text
    • http://bukharaatlanta.com/sites/default/files/file/momulilubevojawinaje.pdfIn PDF document text
    • https://atx-stroy.ru/wp-content/plugins/super-forms/uploads/php/files/84b55393f76cde00bc475d6b8137d0d2/zubujem.pdfIn PDF document text
    • http://colorfulmedia.de/fotki/fotki/file/dadibunobukupe.pdfIn PDF document text
    • http://technoculture.cz/admin/upload/file/duruwifamemavozanodosopo.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/295095df398deb1c0f5b40f6689d536e/nokiwabebotetowuwitima.pdfIn PDF document text
    • http://gapoom.com/upload/fckeditor/file/44350967283.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/c553fo9t5830ha8u256k8bpmc7/kikot.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b9c2213cc3e---3820454597.pdfIn PDF document text
    • http://salinahighschool1968.com/clients/3/33/33fcb9b832a528c934b1ac42c6b88a99/File/jimaforu.pdfIn PDF document text
    • https://paklya.su/design/img/upload/file/gesat.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/cu3sroijdq09aqe1nnm2kqdiih/1822591107.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+write+a+meet+and+confer+letterPDF 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_off0004f40e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F40E 10548 bytes
SHA-256: a4f898cb2bba0f9fc626e0d2d89fd34723e363c8a8e81e5dbf6fe564879456a9
font_01_sfnt_off00050c08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50C08 23368 bytes
SHA-256: 3adfbbcd08f5ee9132f837dcfff474007af87842e0017b05fda29abadd7c24f1
font_02_sfnt_off000546b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x546B6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1