Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b15ea72546e13af…

MALICIOUS

PDF

138.8 KB Created: 2021-08-19 21:07:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 8864d432e8eb38f44633fb1d952ad6c2 SHA-1: d3f6b80574275563931bd62edda2184cd936e411 SHA-256: 2b15ea72546e13af78503058caca2bd7c1bfef5f2763cec95bcd0d4ef987fe3f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of links, many pointing to compromised or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were extracted, the structure and URL patterns are consistent with malware distribution or phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://teplolux72.ru/upload/file/46652743237.pdf In PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/1609eca2404681---85761147899.pdfIn PDF document text
    • http://h-n-s.net/userfiles/file/dazenolapadagudavi.pdfIn PDF document text
    • https://fanaf.com/article_ressources/file/53274341904.pdfIn PDF document text
    • http://hainescentreasia.com/images/file/vezubelo.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607714562cdfe---3994844089.pdfIn PDF document text
    • http://valsadindustries.com/userfiles/file/90039347626.pdfIn PDF document text
    • https://www.bmo-agencement.fr/ckfinder/userfiles/files/ladakorix.pdfIn PDF document text
    • http://schodylux.pl/userfiles/file/7568353258.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160c027ea178eb---sutulotusopovar.pdfIn PDF document text
    • http://marymo.ru/uploads/files/nageseveroxopewepinibof.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/5e021cc8d1ecd9054479a084613b823c/16491777701.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087ef1f45653---vigitugifik.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6fb93db118---vosinumipemuboluzolumed.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///moxamuvigajeje.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f86b3d06ef---begon.pdfIn PDF document text
    • https://valenciamaids.com/userfiles/files/vabowibelexunapusa.pdfIn PDF document text
    • http://suachuathietbi.com/upload/files/pemugeb.pdfIn PDF document text
    • https://mobile-translator.eu/app/webroot/media/files/8973048522.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/cfd3ecabf649f3fccd3a38fdfdfd80cc/16778272805.pdfIn PDF document text
    • http://papaicountrylodge-longstay.com/user_img/files/jerabase.pdfIn PDF document text
    • http://seabeachthailand.com/UserFiles/file/60811625449.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160b5940e4c3cf---dulovatinazoniwap.pdfIn PDF document text
    • https://auto-rujo.com/images-editor/file/54787747023.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=twilight+breaking+dawn+part+3+full+movie+download+in+tamil+isaiminiPDF 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_off0001b6ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B6AE 18784 bytes
SHA-256: f388a36d532e7c73e1d37119f63b32e14021f2c168a2b24b112781e00995f0c6
font_01_sfnt_off0001e778.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E778 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001ff8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FF8F 11564 bytes
SHA-256: 0aee6f6c6b8ae864638506c2f802d408c8b35e3bfe03a37d95ea0ed1b0046741