Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce6ab5a9393d7131…

MALICIOUS

PDF

121.0 KB Created: 2021-09-17 09:19:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: a70be3fd23a8d3c3d8f083622e64d3a5 SHA-1: a18ccbd6aaf2ae9f51d3533fa5fa9d7bf89831cb SHA-256: ce6ab5a9393d7131e113c627f702c71d07d443b237929a65cf6b7252f075c572
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are part of a link farm hosted on disposable or compromised domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of multiple external links suggests an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://oniceh.ru/uplcv?utm_term=pokemon+emerald+gameshark+pokemon+codes PDF link annotation
    • https://digireg.dk/upload/99154003396.pdfIn PDF document text
    • http://modernplating.com/userfiles/file/tiwunifizol.pdfIn PDF document text
    • http://ecme.site/2015/vat/upload/files/93462647992.pdfIn PDF document text
    • https://e-motorcycle.tw/upload/emotorcycle/files/guxav.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/ueb35n0cotkepe3f4n8pukmkt6/9450315672.pdfIn PDF document text
    • http://studiogiamberardino.it/userfiles/files/92088126275.pdfIn PDF document text
    • http://www.binghan.my/userfiles/file/gafafakuwepubomavijevef.pdfIn PDF document text
    • http://stellar-toys.com/ckfinder/userfiles/files/4202212309.pdfIn PDF document text
    • http://sieuthibongda.net/ckfinder/userfiles/files/turesuvatetosi.pdfIn PDF document text
    • https://aneri12.cz/res/file/lujireboki.pdfIn PDF document text
    • http://happyland-nsk.net/ckfinder/userfiles/files/kalofibinukudasewitexuton.pdfIn PDF document text
    • http://compow.net/ckfinder/userfiles/files/11682110283.pdfIn PDF document text
    • https://horizontire.com/userfiles/file/97618376440.pdfIn PDF document text
    • http://festacreativita.org/userfiles/file/55705443064.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16134688f658bd---32958313421.pdfIn PDF document text
    • https://99shayari.in/userfiles/files/77749388906.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/16133984093050---49973359642.pdfIn PDF document text
    • https://fultoys.com/userfiles/32004270548.pdfIn PDF document text
    • http://cungcapbaoduongcuanhatban.com/upload/files/jetife.pdfIn PDF document text
    • https://olgunbey.com/upload/ckfinder/files/60077545400.pdfIn PDF document text
    • https://tamphuctriland.vn/upload/files/vimevojimadozojipekuselo.pdfIn PDF document text
    • http://ozt.zielonetarasy-cieplice.pl/uploads/userfiles/files/daxofanagiban.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614200677f005---nuxupemefararajegovek.pdfIn PDF document text
    • https://musikkursus.dk/userfiles/file/38633657263.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132b0cf16eec---wosofesuwelanowufubepaxo.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_off0001742e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1742E 18832 bytes
SHA-256: eaffa910956201a8399718ca2a4d26adc8e3863d6ab5b58d996e014777a4be09
font_01_sfnt_off0001a55c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A55C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001bd73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BD73 10864 bytes
SHA-256: a83315011808f2456c44f43dc7b2c9be53e800dbff5fde38cd1ec9ed45f503a4