Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bebc4137a7997fd…

MALICIOUS

PDF

172.1 KB Created: 2021-09-08 18:29:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 097c2d9cd2a2cc7056c318017047cf69 SHA-1: b0fcb03cc1b14ea5b08bc0165c630c3e9bd4442e SHA-256: 2bebc4137a7997fd463a0648b1838f49b064d28226aaac2e426831e3f827c8eb
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised websites or disposable hosting, indicative of a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The presence of external URIs and compromised CMS upload links further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://umartravel.com/files/joponepugizorevarozotanuz.pdf In PDF document text
    • https://bwhe.in/ckfinder/userfiles/files/wagiwixefiwofanesivobaru.pdfIn PDF document text
    • https://samsungvrvklima.com/upload/ckfinder/files/24706416930.pdfIn PDF document text
    • http://24hnbc.com/assets/ckfinder/core/connector/php/uploads/files/zabowovanog.pdfIn PDF document text
    • http://thaoduoconline.com/userfiles/image/file/zejutitudesasozizikeru.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16136091e12807---rolumeluxadoxofalosin.pdfIn PDF document text
    • https://arhometutor.com/userfiles/file/73508566653.pdfIn PDF document text
    • http://drivingtesttips.ie/fckeditor/userfiles/file/16520610486.pdfIn PDF document text
    • http://builderall.info/userfiles/file/26161293222.pdfIn PDF document text
    • http://thaimassagemodel.com/ckfinder/userfiles/files/sogebunorev.pdfIn PDF document text
    • http://ranahytta.com/ckfinder/userfiles/files/ruvamonuvirojizuzufe.pdfIn PDF document text
    • http://abwcrainhwy.com/uploads/files/mawuravikekaz.pdfIn PDF document text
    • http://cpk.by/ckfinder/userfiles/files/58002383740.pdfIn PDF document text
    • https://gregoryshow.ru/files/file/wudoresezugopibanokurig.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612e985d3b705---89373568732.pdfIn PDF document text
    • https://www.tvmreza.tv/ckfinder/userfiles/files/dokalaripuveba.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/16138cf184e694---92917715755.pdfIn PDF document text
    • http://rent-lease-no1.com/userfiles/file/20210903061459.pdfIn PDF document text
    • http://clickvay.com/upload/files/didit.pdfIn PDF document text
    • http://jun-travel.com/userfiles/file/84406771504.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=les+r%C3%A9int%C3%A9grations+et+les+d%C3%A9ductions+fiscales+au+maroc+pdfPDF 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_off00022ebd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22EBD 24976 bytes
SHA-256: a483572d889045a0d25e78c65b65bf1b8a57799afa4ebddf14ecd69bde399d9d
font_01_sfnt_off00026d82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26D82 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00028599.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28599 11176 bytes
SHA-256: 86067ba71c3259c57b704f076f7754f8704da0af20c96c1bc5ca79452b503a6e