Malicious PDF — malware analysis report

Static analysis result for SHA-256 36e0fcda49482c09…

MALICIOUS

PDF

85.2 KB Created: 2021-08-29 04:49:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: a68df122ac6d8187f4dcd2fbd86b6804 SHA-1: a03f660d7ed0b74d19989962c9a19ca4b47de705 SHA-256: 36e0fcda49482c095fcee05c454f8497304bbb8e869539dcbdc524400c5a893a
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress upload directories, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of multiple external URIs and compromised CMS upload links reinforces the conclusion that this document is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://crysiq.ru/uplcv?utm_term=the+most+abundant+greenhouse+gas+in+the+earth%27s+atmosphere+is PDF link annotation
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607faef4e98ca---sejipalipe.pdfIn PDF document text
    • https://people11people.gr/uploads/File/wurokareberizika.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086dac8d6e1b---potixerevudodijenek.pdfIn PDF document text
    • http://srutimusic.org/userfiles/file/bakudakez.pdfIn PDF document text
    • http://zae.me/datafiles/file/jepoviwa.pdfIn PDF document text
    • https://valleyrentals.com/userfiles/file/68506367742.pdfIn PDF document text
    • http://stolizstekla.ru/userfiles/file/wadifimurujipupoluvefik.pdfIn PDF document text
    • http://codemessaging.net/ckfinder/userfiles/files/90946880011.pdfIn PDF document text
    • https://kungfuclasshongkong.com/louis/taichi/ckfinder/userfiles/files/vezonobojikutexejasut.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/48066350bc81fb8c3e0586163b29365a/topuz.pdfIn PDF document text
    • http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160787fb027198---24351155637.pdfIn PDF document text
    • http://grappin-annat-como.com/userfiles/grappin-annat-como.com/file/16227841410.pdfIn PDF document text
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/4cadc5003fd7fa761fe0236e7c8b132c/kitag.pdfIn PDF document text
    • https://ubk-sad.de/azubi/userfiles/files/77660546825.pdfIn PDF document text
    • https://zemiigori.com/uploads/file/foguporodavesazomogij.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/bmdtrf0jv0t7606ccsuuqlcdl7/4582757873.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e961b2a3ed---38646287770.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/24cf5dd8ea143433ff14cd5ae2380fb0/rosomorajevaxo.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/navakuzosigud.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/c02d61945c869d55462cd6f1aa48651b/luvoroduvepawinukuwotet.pdfIn PDF document text
    • http://hzbaoyan.com/images/upload/File/52968478078.pdfIn PDF document text
    • http://snsi.jp/image/news_file/petinezifokojot.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/161216a68032b2---21883560337.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/a1042339a4be06416de6c69ada0a4852/17757133983.pdfIn PDF document text
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cdfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDFC 17104 bytes
SHA-256: b38c6b8cfea545b7ed06ddf3142e2c669aa9d32da9f98c7076a476b4e1241134
font_01_sfnt_off0000e6b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B8 16760 bytes
SHA-256: 15313be3dfc82d9a832da1117d48f0e9cf2b49e03d73808894158bdc1499a32e
font_02_sfnt_off00011214.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11214 11028 bytes
SHA-256: d9daaff6b3c005d48867850402b32a2072880c5a6d9d523c7d328009677f9609
font_03_sfnt_off00012b25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B25 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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