Malicious PDF — malware analysis report

Static analysis result for SHA-256 f24f326227891289…

MALICIOUS

PDF

80.9 KB Created: 2021-07-18 19:05:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: bde2644a2b10a2cd9075a9abf87d7ba5 SHA-1: f9dfb0a880d818b77a10c88165abba7097201b78 SHA-256: f24f326227891289d0273c001fd96a8c7fe09a1b435737dd8c8cdd0d8e8974b9
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as a link farm, with many URLs pointing to compromised WordPress sites and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as phishing or a trojan. The embedded URLs, despite some being marked benign, contribute to the overall pattern of directing users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://wills.sg/wp-content/plugins/super-forms/uploads/php/files/a8b0a5daeee6c1a552b66c109da6fcbf/15125202239.pdf In PDF document text
    • http://www.cpnatacao.pt/backoffice/ckfinder/userfiles/files/vodivefebinut.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c33a8e901c1---durilopoxo.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/44f0db5b92ac3dfb7aae5e549caa1215/taligesigabid.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/6512bc433965a429486c63d45faccfe2/gogilon.pdfIn PDF document text
    • https://savitravel.ro/ckfinder/userfiles/files/zizasugafagejikutufafib.pdfIn PDF document text
    • http://accronline.com/userfiles/file/jopen.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2ba45caf9b---64220878243.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e53d4d98bc---xokugavora.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160888d78d7165---setixejil.pdfIn PDF document text
    • https://gadd-asso.org/userfiles/file/waratezotubox.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/52425790233.pdfIn PDF document text
    • http://teplospectr.ru/images/files/70068141369.pdfIn PDF document text
    • http://www.jobsincrete.gr/images/_user_na/file/sewasamaw.pdfIn PDF document text
    • http://orderkai.com/uploads/files/fexusenav.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/cd0b84ebc01d09d2f0a0d2a5219df81b/taludifipunasojajagigoxe.pdfIn PDF document text
    • https://armagedonspedycja.pl/files/file/jureronajajufipaminokix.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160715b2584e12---28850002153.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/kj67p7s2vcc2j5ik5fhklnfdng/57876626949.pdfIn PDF document text
    • http://bogelaipigeon.com/upload/file/pixuvizifirogojewo.pdfIn PDF document text
    • https://sukhayurveda.in/userfiles/file/92019535577.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160948479989fa---bomiludolosigezot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=open+pdf+files+without+adobePDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d84c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD84C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f063.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF063 10848 bytes
SHA-256: 4ca84291bb20cdb8a5ccf08ed29dceff51953f7ddd24722e5eb11f29add8f6dc
font_02_sfnt_off0001093a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1093A 17292 bytes
SHA-256: 2a48d64e26cedc17bc5810118ddad28ec9239748506968ae017f957162ebf2ee

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