Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b64e0a504f73dfe…

MALICIOUS

PDF

88.5 KB Created: 2021-08-31 10:28:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6a6e22c5668fbabb32d0252561b4541f SHA-1: e5fd63dd1924839adfd47057b2b786c20a828aa2 SHA-256: 2b64e0a504f73dfe9ea7b1e1374ec70b285543a53340395baba46e9805b6923b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It functions as a link farm, directing users to compromised WordPress upload directories and other disposable hosting sites. The embedded URLs suggest an attempt to lure users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/d57e1123d1312acef15f1092707d8001/vekawobosixozo.pdf In PDF document text
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160860b39ebcdb---pojerive.pdfIn PDF document text
    • http://sovaimm.it/userfiles/files/maxizizewovoxemekose.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d413b49c9a---70265479662.pdfIn PDF document text
    • http://shesob.com/file/files/90189781945.pdfIn PDF document text
    • http://www.guus.edu.mn/ckfinder/userfiles/files/fogumapozu.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cdb984d3b1---61164331183.pdfIn PDF document text
    • http://bharatandcompany.in/ckfinder/userfiles/files/73333629246.pdfIn PDF document text
    • http://chinasoftcore.com/userfiles/file///47551865525.pdfIn PDF document text
    • http://we2meeting.com/ckfinder/userfiles/publics/files/lojugoloriforota.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608de3d9335a8---gemejis.pdfIn PDF document text
    • http://kondicionery-dolgoprudny.ru/upload_picture/file/vawadobuge.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/pibinumanifilawak.pdfIn PDF document text
    • http://ettermanenterprises.com/ckfinder/userfiles/files/xokasuxejisa.pdfIn PDF document text
    • http://nelly-design.ru/upload/files/rezopexapezoraxore.pdfIn PDF document text
    • http://www.giuseppe.ru/ckfinder/userfiles/files/61844771077.pdfIn PDF document text
    • http://pspectr.ru/userfiles/file/melulam.pdfIn PDF document text
    • http://sungsam.net/userData/board/file/9444313620.pdfIn PDF document text
    • http://ekolojikweb.net/upld/userfiles/file/vaxilobuwidi.pdfIn PDF document text
    • https://aonetreks.com/uploads/file/21663669905.pdfIn PDF document text
    • https://machnhaduong.com/images/uploads/files/rugotaworijum.pdfIn PDF document text
    • http://radio6deenero.com/uploaded/files/vibarusaviz.pdfIn PDF document text
    • https://dacinsara.ro/fckfiles/file/devojuxoxilapodupomorexer.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/f6jpjgi8ra09n1ddg9ef4jlv9l/wumefogejibupukoke.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/14611674374.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=how+do+stock+shorts+workPDF 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_off0000f658.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF658 18036 bytes
SHA-256: 94c7a972f22a34d245628c0423ac84e2273a55753a45f59647c25ab99d46caed
font_01_sfnt_off00012599.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12599 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013db0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DB0 10100 bytes
SHA-256: d5435349b73c338b063ce940c393f3b4826ddf08b0abba1fc719240bfec83009

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