Malicious PDF — malware analysis report

Static analysis result for SHA-256 30ae4032f51e1aaa…

MALICIOUS

PDF

72.9 KB Created: 2021-09-01 12:00:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 256d5dac9e789e251fcc07902a88b08e SHA-1: 7efb3717ddd7f6e0e69e3eb741caf14bb4575bce SHA-256: 30ae4032f51e1aaa2108071fd617a62deafd9e068b52559460666a50bd461813
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting it functions as a link farm to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the presence of multiple external URIs and compromised CMS upload links points to a tactic of redirecting users to potentially harmful destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16080ddc4b336f---86796876970.pdf In PDF document text
    • http://melly-incendie.fr/img_db/43819333354.pdfIn PDF document text
    • http://creativetechno.in/userfiles/file/xatot.pdfIn PDF document text
    • https://mobilieroccasion.fr/uploads/file/85950063287.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/88dc6d8dnp48jsum00ggo1p7jq/zapuwapo.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c02682bdce9---44021016729.pdfIn PDF document text
    • https://bawwabatrizq.com/userfiles/file/kojonanorifom.pdfIn PDF document text
    • https://actorconseil.com/files/file/96001568860.pdfIn PDF document text
    • http://simmsfamilyreunion.com/clients/9/98/98d47f1658d09d39d77ba56043454c9c/File/ligugoxesizigebesije.pdfIn PDF document text
    • http://esejsc.com/upload/files/bavizi.pdfIn PDF document text
    • https://aimhc.com/userfiles/file/50338792834.pdfIn PDF document text
    • https://sukaunited4d.vip/contents//files/69304718897.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610f17477ea4f---99692876158.pdfIn PDF document text
    • https://atvatextile.com/upload/ckfinder/files/95153322567.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db569a53540---wujedoxagofabuvofozamusa.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/161086d47a3f2c---jipadirokekijavobep.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/5qa5gtobpmmi9sbktdogjuorbe/29628306090.pdfIn PDF document text
    • http://redeyeldn.com/userfiles/file/95242030194.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c32709c9fd0---sewinezejitegesilo.pdfIn PDF document text
    • https://jin-ji.com/upload/files/29065653028.pdfIn PDF document text
    • https://eletvital.hu/uploads/files/luturifafunus.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607378e7e33ab---pewejufibojisuvonekoge.pdfIn PDF document text
    • https://www.cylinder96.ru/admin/ckfinder/userfiles/files/fowakolulovuravenupipuka.pdfIn PDF document text
    • http://www.hydro-tg.pro/upload/file/49162292808.pdfIn PDF document text
    • http://promador.pl/userfiles/file/mategaroritemumawizumosaw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+save+a+pdf+to+iphonePDF 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_off0000baa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAA9 16344 bytes
SHA-256: f9c60a08966e6cf8a5b38712ec63ae3125179d68c98679b6d053bd2075adad17
font_01_sfnt_off0000e43d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE43D 10592 bytes
SHA-256: 957a984a75fb073b3a73800a8999d4a85170182ad3359a436d75b29bd0445cae
font_02_sfnt_off0000fc65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC65 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1