Malicious PDF — malware analysis report

Static analysis result for SHA-256 7095a50ada586fa3…

MALICIOUS

PDF

73.5 KB Created: 2021-07-26 06:31:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 790978e171b1e94d1cf55bc6cc79065a SHA-1: e711e1c5ef54b2f1ffbec77b3ca615019040fddf SHA-256: 7095a50ada586fa394f2262e21003f694d53b5415d61d759345c3398fd3a7f21
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are identified as compromised CMS uploads or part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery through these linked resources. The document body is heavily obfuscated and unreadable, providing no direct user-facing content but the structure and heuristics point to a malicious link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f2c5b841e3---vuwilefa.pdf In PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a11786a29df---62273190851.pdfIn PDF document text
    • http://michellesmithscott.com/clients/36670/File/61612049055.pdfIn PDF document text
    • https://ngoctraithaibinhduong.com/uploads/news_file/68684917262.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc94fed0c0---19574441661.pdfIn PDF document text
    • http://diclenakliyat.com/userfiles/file/nodaboze.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e48677cd05---lerufureso.pdfIn PDF document text
    • http://letresorellebio.it/userfiles/files/xunovuwiko.pdfIn PDF document text
    • https://farstaslottsvik.nu/anvandarbilder/153/files/wisarokowobi.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094c561b66f7---43392800441.pdfIn PDF document text
    • http://phuvuongcorp.com/luutru/files/xoxolulameravaki.pdfIn PDF document text
    • http://bbpcosmetics.com/admin/upFiles/2021-5/file/muwufibojozepuvepiwa.pdfIn PDF document text
    • http://dijladentalcenter-qa.com/userfiles/file/fizufamepikese.pdfIn PDF document text
    • http://lukinserv.hu/file/31589868782.pdfIn PDF document text
    • http://premium-t.info/files/files/76709548331.pdfIn PDF document text
    • http://rubensova16.cz/files/file/18095169850.pdfIn PDF document text
    • http://willettelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fivuzotifaranak.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/a9bpf3a73tqmismkehars1jde1/dutubili.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/37286481559.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/c2e3e3701229ee10589e18963492341b/fadenabevetimigokisivibin.pdfIn PDF document text
    • https://ibliberia.com/ckfinder/userfiles/files/49294305447.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/6b9e51a8345d7d2809b6c56762fba70e/66717561824.pdfIn PDF document text
    • https://mps-india.com/userfiles/files/10801355527.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=verb+tenses+exercises+multiple+choice+pdf+with+answersPDF 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_off0000ba4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA4B 16892 bytes
SHA-256: 9b33d69228234ee1d2e51a7746b7e050baca24eeea07c94524e39b797faa2b65
font_01_sfnt_off0000e640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE640 11284 bytes
SHA-256: bc1c4965004997e8ed721dd6542be1badbe49562cf52462b84ea39eca683d95d
font_02_sfnt_off0001006f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1006F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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