Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fc908c2d9326dea…

MALICIOUS

PDF

96.2 KB Created: 2021-08-14 08:22:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 203ce42df5e6f1cba0599b2eed24d08c SHA-1: 48e411339e43f9afa6c8bd1910a2248fb7847e36 SHA-256: 1fc908c2d9326dead87fb7cd2dd779699c02f35c8c3237de8b45b481efead653
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Several heuristics indicate the PDF contains a link farm pointing to various websites, some of which are hosted on compromised CMS upload directories or disposable hosting. One heuristic specifically points to an IP address, suggesting a direct attempt to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://kjphotocon.org/data/userfiles/files/xigesofuruxuro.pdf In PDF document text
    • http://portableandcool.com/files/files/pitosipimukumugeviraza.pdfIn PDF document text
    • http://stroi-sistema.ru/img/11186783418.pdfIn PDF document text
    • https://rozgarnetwork.com/ckfinder/userfiles/files/wenijogididagaxeketuxe.pdfIn PDF document text
    • http://abwferrellpkwy.com/uploads/files/rapoluxojuvajema.pdfIn PDF document text
    • https://tecnicadovolante.com/images/file/76581262316.pdfIn PDF document text
    • http://www.rodnolespropertymanagement.com/siteuploads/editorimg/file/papikalarudipopepisulo.pdfIn PDF document text
    • https://amursvoidom.ru/media/files/megikamudonugar.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d63b7c625a---bodasijemiwe.pdfIn PDF document text
    • https://et-auditing.com/userfiles/files/fumig.pdfIn PDF document text
    • https://menu2uplus.com/images/file/48647923397.pdfIn PDF document text
    • http://urbanconstructions.org/images/uploadedimages/file/68440932149.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/7dd0a99d600015df37e445b95a849c84/48924358289.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b83e5b61d2---58493685308.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e65dd082ba2---rijewejani.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609b51eae4e2c---muxibiso.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/16088296ccf213---66546387284.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/ch6sgm2c30ekap3gkg771ooftu/58556673272.pdfIn PDF document text
    • http://enidental.com/userfiles/file/20210814111426.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3979fe3e3d---wilitak.pdfPDF link annotation
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a98e204db9---zozujezotev.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/8c9ae9a845c50ca0067abff644667b9a/19268192053.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160a2311b90974---17705290372.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=mainstays+parsons+easy+assembly+tv+stand+for+tvs+up+to+65PDF 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_off000105e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105E5 11376 bytes
SHA-256: ae20d9e4591510fdf8391b2dcf0f3ada15af6ec63e07c5f2badac1c716a48905
font_01_sfnt_off00012090.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12090 21188 bytes
SHA-256: 3ae70620a99bd3bbe743f2a476cf2e869f259ead95ef1658739962bd4eacf1d5
font_02_sfnt_off000157f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157F1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.