Malicious PDF — malware analysis report

Static analysis result for SHA-256 8827739894d19cc8…

MALICIOUS

PDF

78.3 KB Created: 2021-09-09 09:50:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 94f51d081b1fdf2a48f1530aad632a7f SHA-1: 76265f84a049736d1d8b20a1f003e9a4552fc0c4 SHA-256: 8827739894d19cc86ddd3b6178d177f742cd3f74d35352703826c35afda6a2ce
176 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to various domains, many of which are associated with compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://abwgulfport.com/uploads/files/mujaxek.pdf In PDF document text
    • http://owv-sad.de/userfiles/files/11542531074.pdfIn PDF document text
    • http://popnmusic.fr/userfiles/file/26045960408.pdfIn PDF document text
    • http://jungam21.com/upfiles/file/1630548769.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/62870331397.pdfIn PDF document text
    • http://memsports.com.br/admin/libs/ckeditor/ckfinder/files/xitakekojopugani.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/55a43064aa905313604dd9c96445d0b9/8654245488.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/098c870cc8b3f95641bc50e598647791/57407369550.pdfIn PDF document text
    • http://kazuma.ru/ckfinder/userfiles/files/74127344906.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133438e41859---dijakamegu.pdfPDF link annotation
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/16136ad51e8fe8---19009257703.pdfIn PDF document text
    • http://ziguratex.com/helpdesk/app/webroot/img/userfiles/files/31655041390.pdfIn PDF document text
    • http://ok-poland.com/userfiles/file/39833059158.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16138be4139288---3250731812.pdfIn PDF document text
    • http://rymwid-training.com/userfiles/file/72806810270.pdfIn PDF document text
    • http://www.pacautomarketing.com/file/rudagisorazudakabidi.pdfIn PDF document text
    • http://escalierdurire.fr/ckfinder/userfiles/files/melaxukajumamumeroluzera.pdfIn PDF document text
    • http://kleiberit.ru/files/file/sananejuzedufifi.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/65f0df335aa46e5ffbf0ed4198934708/14630923826.pdfIn PDF document text
    • https://xeroxexpres.cz/userfiles/file/zogorolupefotoxosi.pdfIn PDF document text
    • http://liveisagenix.com/ckfinder/userfiles/files/92046600606.pdfIn PDF document text
    • http://bigcool.net/webroot/img/files/94178430125.pdfIn PDF document text
    • https://posaonakosovu.com/ckfinder/userfiles/files/nofewurujireki.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=uphill+rush+frivPDF 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_off0000cb98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB98 19216 bytes
SHA-256: bc68562844f5ec248a2793b03f5f1d7f6e991734e8217ebdd4f7ea6e77cd74f7
font_01_sfnt_off0000fd45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD45 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001155c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1155C 10012 bytes
SHA-256: 071311442eab73f5150f6c0235640dcedf74900316d490a9ddfb8397b637f24c

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