Malicious PDF — malware analysis report

Static analysis result for SHA-256 992581021192ce02…

MALICIOUS

PDF

78.9 KB Created: 2021-06-23 04:00:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 6e2d25d2bcd6dd8624532eacfbc9bd6b SHA-1: ecb7f36e7e65311e099f1174661f0417698d1628 SHA-256: 992581021192ce020792d2cd1a06be44cac36e9f2109bda28171ce60757e82e6
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous links, many pointing to compromised CMS upload directories and disposable hosting, suggesting it functions as a link farm. The presence of the string 'papa's bakeria to go download' in the document body, combined with the link farm behavior, indicates a likely phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/fdf6a2f4ec7480f1246c7264a30bfe46/21784396274.pdf In PDF document text
    • https://dixietemporarystorage.com/wp-content/plugins/super-forms/uploads/php/files/e18e9f5cac031d7d793d3d5cefc11894/gibejeset.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1b698d003d---76591611102.pdfIn PDF document text
    • https://paklya.su/design/img/upload/file/75858838782.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/160c70f664119a---66384186880.pdfIn PDF document text
    • http://jnafarms.com/clients/864068/File/17176878893.pdfIn PDF document text
    • http://xn--3e0b556bhrbowi6undva.com/ckupload/files/bokal.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/gonunukixugorumufuwedi.pdfIn PDF document text
    • http://mientrungpetrohotel.com/users/files/xufinuxatukusulapisefulev.pdfIn PDF document text
    • http://gourmethousemacau.com/UploadFilesfile/%5C/jomonisuxojolinenutapibu.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086eaf3d4229---jefuxiz.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aea7be79900---kikivipajerawome.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160779766e4f47---12312627301.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/24c95f757f91044dcdb33b43a9bb8424/taxinovevamonusipupe.pdfIn PDF document text
    • https://contactfm.be/userfiles/files/zilut.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/1065a4dc8366f7d9f3e931b320904356/kitikewibojosatif.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=papa%2527s+bakeria+to+go+downloadPDF 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E1 5456 bytes
SHA-256: f332debe592e9de967d376658c298de1504b69e8741e708fd453e29c97a79196
font_01_sfnt_off00010690.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10690 11228 bytes
SHA-256: 01a1d5907ca5b009d6d09526eb1c8d38840716214705d62435575dc424068424