Malicious PDF — malware analysis report

Static analysis result for SHA-256 2233f6507adae48b…

MALICIOUS

PDF

111.4 KB Created: 2021-06-17 22:43:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 8d44e96b9b8442828690581de486e207 SHA-1: 971fefbfe1d9a7c016900daaf42830d9ee04c6e4 SHA-256: 2233f6507adae48b62bc0424005bfadd1ccda51a14bc5c477be03e254bc80ac6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many of which point to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to lure users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://argentum.com/wp-content/plugins/super-forms/uploads/php/files/5c3glj3a3hfkb5umdaq1h7cfct/81774719927.pdf In PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160cb4a9627a5a---93949880371.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/uruis9qpp92bvh4jtvf0smj57p/xekusobi.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160759c880a032---vezogililuxosama.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/96207996fd8d087848a1a332e0d93c27/vexevojubo.pdfIn PDF document text
    • https://schilderlesvakantie.nl/ckfinder/userfiles/files/metoteri.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086234e1ddb7---2799231735.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16082b2c97d963---rijefanuxot.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a1340f69bb8---57832192954.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16086708b6ea99---16951608017.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb35324853---25306196025.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/16093a3b2256e6---79968217883.pdfIn PDF document text
    • http://wawa757.com/uploads/files/94500493589.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/547d83207f5e5bd7df8732aaefe96901/63537770026.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/80810571797.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/ed0b5e0da1d6f998b49cb701c8af85d5/soxevomixupaj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=town+hall+10+anti+air+basePDF 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014d54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D54 5148 bytes
SHA-256: 423780bc489857e368de58d5f11d16d835118ba77dd6a5c943acea75a21a81b3
font_01_sfnt_off00015edd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15EDD 15148 bytes
SHA-256: dec2f512b96285241ff12503a8aeef0ab7e0ef2658baa9359da61d9fca2c0beb
font_02_sfnt_off00018bd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18BD2 16212 bytes
SHA-256: 6f25ed303463856ae9fba79e4096b1a1247f27ecd41a80454f050268c8214489
font_03_sfnt_off0001a168.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A168 3784 bytes
SHA-256: 0396877e8300a33ad1a5f4515267ca2e88e4ddbd88111198bb94e6230d8dbe62

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