Malicious PDF — malware analysis report

Static analysis result for SHA-256 754caa06d23b2d5a…

MALICIOUS

PDF

72.2 KB Created: 2021-09-07 02:34:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b6a1e0186232f44b7bcc561aa1c96f8f SHA-1: a31cecc5df4570755e172e8d1aaf84e4a53324a8 SHA-256: 754caa06d23b2d5ad1b8b9393d88a05093e560d30a9bda68676d319e6954d428
176 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple external URLs, some hosted on compromised WordPress sites and others on disposable domains. The presence of numerous links, including one pointing to a raw IP address, suggests an attempt to distribute phishing content or further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/161309e5775a95---75658787617.pdf In PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085772009048---luzifuxusuf.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612d0bfd38902---dowujilirotura.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/b9c3edeaff51e31eaf5ce720a2fd7d40/zobenolotolomakowimudase.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e171a7c773f---51644161676.pdfIn PDF document text
    • https://propertiproperty.com/Uploads/userfiles/files/21809799500.pdfIn PDF document text
    • https://eitmedu.in/ckfinder/userfiles/files/faketujimesamujam.pdfIn PDF document text
    • http://alotercuman.com/ckfinder/userfiles/files/roxuvedezuzesuboni.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160e237efb0b58---92438231224.pdfIn PDF document text
    • http://qianlong99.org/ckfinder/userfiles/files/zewadedebopiwodujetopumi.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/072abd16023ae6124c22ef7e7636ffaa/foxedojekomufidetapidiwos.pdfIn PDF document text
    • http://asianaccounting.com/admin/fckeditor/userfiles/file/86151212201.pdfIn PDF document text
    • http://drapa-technika.cz/UserFiles/File/vuxubetajef.pdfIn PDF document text
    • https://motiwalainstitutes.org/userfiles/file/63186210171.pdfIn PDF document text
    • https://limblength-sldf.com/userfiles/file/26378530187.pdfIn PDF document text
    • https://schmitz.cz/res/file/varitovofet.pdfIn PDF document text
    • http://bennyhigh73.com/clients/3/33/33ce00c6a031cf3b17a3dcf69aaa7594/File/63698167429.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/1608168a782d26---nusajigojewebobekumud.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/16088756594e39---43018083410.pdfIn PDF document text
    • https://whitesal.com/data/images/file/3331_20210724054311.pdfIn PDF document text
    • http://mesterek.net/tmp/41473125692.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/7a0ec6a547a0f0a9de8b4fe1585837d5/lenavolalowasunenemas.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/16082fe7aebe65---10026003813.pdfPDF link annotation
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=simplifying+rational+expressions+worksheets+with+answersPDF 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_off0000b936.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB936 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d14d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD14D 11272 bytes
SHA-256: 204b9738a856b0b7ee729315ca2a9b700fe0a3ade5e48736afbe1f948ab4d2f1
font_02_sfnt_off0000eba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA2 15460 bytes
SHA-256: fcd2318e3af860c7b6ef80c0d0b0620234f0ff0bde2a53a7790cbbd7f4509a10

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