Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c1680f102de2847…

MALICIOUS

PDF

88.8 KB Created: 2021-08-16 01:31:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 66f63114ce7d2fe425db8bec0430efec SHA-1: 09eff2d95d20ff00bc7d78914e567ec9ccae26ef SHA-256: 1c1680f102de28476b87a495f00d0f72e908bddd33d8c7e0127e6be81345e1b5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript, which is often used to redirect users to malicious sites. Heuristics indicate it functions as a link farm, with multiple URLs pointing to compromised WordPress uploads and disposable hosting, suggesting an attempt to distribute further malicious content or conduct phishing. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/5f0002ab15405e12fe0a56ad34c6a18b/bulijekararo.pdf In PDF document text
    • https://diaochue.vn/userfiles/file/50778332227.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160784e752c2cb---texemog.pdfIn PDF document text
    • http://chsjackets75.com/clients/a/ae/ae1e0d6431e3080ad3d3eb1024a27f31/File/57788013442.pdfIn PDF document text
    • https://angkoronetour.com/userfiles/file/29884710247.pdfIn PDF document text
    • http://volvo-cars.jp/js/upload/files/43170333060.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098c4e1a4320---86808705973.pdfIn PDF document text
    • http://cc-loges.com/uploads/file/31062466205.pdfIn PDF document text
    • http://guides2alpes.org/uploads/file/30034585168.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/13o0pshp35nvhpejfumvuaq752/67423093561.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b488db873bc---94613218761.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/f62096f6f7f75195891e163df56d07c3/doxikimufesozi.pdfIn PDF document text
    • http://ferrocom-spb.ru/userfiles/files/62562959657.pdfIn PDF document text
    • http://wintec-samu.hu/uploads/files/96030778564.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/xiximenitifamat.pdfIn PDF document text
    • http://broomfield82.com/clients/4/48/489ff1710263d1ca947d92387d56c809/File/dofawofalox.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/c69b9a6310b6c8f06027e824bb351e39/bugegazoneso.pdfIn PDF document text
    • http://brezov-gaj.si/uporabnik/file/36283639450.pdfIn PDF document text
    • http://cuhs1981.com/clients/8/82/82ca37c076ec4232796cb58ed009bb3a/File/jaxigutekarij.pdfIn PDF document text
    • https://thefertilizergranulator.com/d/files/pejexojuxerevazi.pdfIn PDF document text
    • https://wildnaturetravel.com/File/12152496937.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095033899fa8---ririvelotabeku.pdfIn PDF document text
    • http://sumnerclassof1976.com/clients/4/49/49b54eafcc86ae0c30eb104ab8b91c7c/File/fusegenutanupokovijepuwe.pdfIn PDF document text
    • https://guclupin.com/calisma2/files/uploads/88031139555.pdfIn PDF document text
    • https://www.lire-les-notes.com/ckfinder/userfiles/files/66215612264.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/f8ab39e60a41f73909167877e7339c46/rilurenedisazaxoneg.pdfIn PDF document text
    • https://thietbivesinhsonhoa.com/webroot/img/files/nuxoxap.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=how+do+you+get+the+batman+beyond+skin+in+arkham+knightPDF 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_off0000ef82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF82 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010799.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10799 11172 bytes
SHA-256: b5393f35140e90eb0fa90b0d329ced5bfa4d2fa3a8ebda88a8918ec18138fead
font_02_sfnt_off00012155.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12155 20328 bytes
SHA-256: 38845d3e062375a3e5f54abbe63dc1e61ffcaa49a97c49953796a95571bc9543

Open this report in the interactive analyzer, or submit your own file for analysis.