Malicious PDF — malware analysis report

Static analysis result for SHA-256 72006899c9232cf1…

MALICIOUS

PDF

102.6 KB Created: 2021-06-28 15:52:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ab511fedfcb8342843b0bb16260234b7 SHA-1: 77f87e7ce0b5fb493307b2f130460ecce681a9fe SHA-256: 72006899c9232cf117e997ac6b0b0e2210b52447c5d5ca0cb706d2f1fe7d2337
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites and disposable domains. These links are likely used to redirect users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9926

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://synerhu.ru/uplcv?utm_term=how+to+give+someone+experience+in+minecraft
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/fi7p93rqht5l9rh4u08mb8i96h/30275931724.pdf
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd0029b98b---retuxakemewawamirevuwe.pdf
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/868a9f68e885ed1eca497875d5604c18/pilubanikuxidijevilul.pdf
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/57371795413.pdf
    • https://alianzatours.com/imagenes/file/tadopetalepusuzad.pdf
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a852110f79---42750243278.pdf
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/16085b9e519b93---55447032059.pdf
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/5m5nv0leb2gcu7rn2sr84itvg6/dajofobadimonodegigotod.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608534771bde9---7378350675.pdf
    • https://daotaolaixesontay.com/uploads/file/63443055229.pdf
    • https://ahreco.com/uploads/news_file/pewetugiju.pdf
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c8e85d7b11---ramewekakidesuked.pdf
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/3a874daa23fd7d7ba0a906a4737eb3a4/kadovijepokudoduk.pdf
    • http://nail-free.com/ckfinder/userfiles/files/wexegopa.pdf
    • https://madopin.com/calisma2/files/uploads/41846318968.pdf
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a67c3e26c6---64752423089.pdf
    • http://www.bash.cl/media/file/tijuleviw.pdf
    • http://trendymamy.pl/userfiles/file/faxod.pdf
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/75855367462e5d1437d7d34e72ec3262/bofuwabivo.pdf
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dcf520fd66---wopakivoguxijipixugox.pdf
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/1d28457709888f24da2166dc1ad3eca4/52993485849.pdf
    • http://aimic.com/userfiles/file/rigenasak.pdf
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609a3582818be---zizafopexupino.pdf
    • http://dmhu.eu/uploads/uplib/file/88943902454.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000129b6.bin
efbb0897b5f8e8ea004be9e94d4bf13ddbbdae09e7f6bf523391ee2172f59b93
pdf-font-stream PDF embedded font (sfnt) at offset 0x129B6 18560 bytes
font_01_sfnt_off00015ad5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x15AD5 16792 bytes
font_02_sfnt_off000172ec.bin
341df69df8b7b8a64096d11586408617f53331696954a8973c46f87e4b428057
pdf-font-stream PDF embedded font (sfnt) at offset 0x172EC 11020 bytes