Malicious PDF — malware analysis report

Static analysis result for SHA-256 da2eedbea17b2862…

MALICIOUS

PDF

80.7 KB Created: 2021-09-05 07:09:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 46f7dc05ea7290ab52cc1af033d42eda SHA-1: dfc07d1ad0038a98ee3cebe677ebccb7382579e4 SHA-256: da2eedbea17b2862a8316f2dcb3620b83bb8512e6b9ff81e3855c99b1226de8e
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm hosted on compromised CMS uploads, with numerous distinct hosts and embedded URLs. The primary purpose appears to be redirecting users to potentially malicious content, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160c0878749de0---77138071014.pdf In PDF document text
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/74e19115908312ffd391598ac838bb78/bubelisamanukizi.pdfIn PDF document text
    • http://veterinariacasettamattei.it/userfiles/files/wolalugeruperebi.pdfIn PDF document text
    • https://camping-du-lac-dijon.com/fichiers/30145673847.pdfIn PDF document text
    • http://goldnumber.info/userfiles/file/23889802111.pdfIn PDF document text
    • http://highendschmiede.de/highendfiles/file/zutevudisem.pdfIn PDF document text
    • http://tuzvedo.hu/elemek/file/ruxedeninosakuxixexe.pdfIn PDF document text
    • http://ristoranteibucanieri.it/userfiles/files/35822540718.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/1609443ac1a620---17273191042.pdfIn PDF document text
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/9d6c7b61d25bcc2079b2b24beb09bf16/56663266699.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba614f6fdae---57411093047.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0a5b4d221---tagabubarob.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c77cc670812.pdfIn PDF document text
    • https://proia.bg/userfiles/file/15226851396.pdfIn PDF document text
    • http://mkngsp.ru/upload/files/kopena.pdfIn PDF document text
    • http://pawsandtiaras.com/ckfinder/userfiles/files/tipamonop.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607635bdc20fc---zisabetikonitel.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/kadidipurivonutimuxosiw.pdfIn PDF document text
    • http://satakantaresort.com/user_img/files/51215176250.pdfIn PDF document text
    • https://tkquiz.com/userfiles/file/69987814030.pdfIn PDF document text
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/o3sh27facak0bfoaq0528u15i5/dovenegesuxadumufekopedag.pdfIn PDF document text
    • http://aaaexpressheating.com/userfiles/file/1302823991.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/lonjfpeoejodpmnknnrgconlag/fumisag.pdfIn PDF document text
    • http://iproperty.ae/userfiles/file/majopijaloximebake.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=gastroenteritis+parasitaria+en+perros+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_off0000d5b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5B8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000edca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDCA 17908 bytes
SHA-256: 41a0790b6cd70d60be00320bcb8c410c40454f213e608a003ea4ad3b9bcab990
font_02_sfnt_off00011b4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B4A 10484 bytes
SHA-256: c24a6362830127fc4927eff309dccf369536e1b2c4cf429134e9c6a3327d1262