Malicious PDF — malware analysis report

Static analysis result for SHA-256 8486646adf40ccbe…

MALICIOUS

PDF

95.8 KB Created: 2021-08-06 02:09:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 92f450399aff1c15d487800b9cacf60e SHA-1: dcaa097d05abe67a236d6a4deca1c9f3d5666036 SHA-256: 8486646adf40ccbe28a46a47db5e50883d552fdfe9fd637a71b6338511a93347
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, which is often used to download and execute additional malicious content. The file also exhibits characteristics of a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting an attempt to distribute malicious files. The presence of a visual download button further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/748b9b1a946d010904d8e9ea3e685b12/16142950231.pdf In PDF document text
    • http://landpas.pl/upload/file/68591602331.pdfIn PDF document text
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/bcccc3021f5725455c42c09748cb5d30/durivesogurezomiseso.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607b4b7b4f181---10680311874.pdfIn PDF document text
    • https://1877painters.com/FCKeditor/file/defefoxusilizoxiwedanumo.pdfIn PDF document text
    • http://dynamicyunnan.com/ckfinder/userfiles/files/xozukunaxiduwezoxejawet.pdfIn PDF document text
    • http://c-amc.com/upload/files/tagizuwawovus.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/244a17e96d453bada8cfe9f00bc5f663/20546542709.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/cc203114d772d0c4f2bb931bfd3e5626/vogejafumodul.pdfIn PDF document text
    • http://itssilvertime.com/clients/2/24/24efe347a73a8ce028152bf895bc11a7/File/firiwopidewilujobalowov.pdfIn PDF document text
    • https://serka.com/serka/upload/files/10180334006.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/oij7093q9aaj6piq84runke3j1/8318790415.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160d541910013c---7596315171.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/dojavixekuziti.pdfIn PDF document text
    • http://ptaki.info/imgekoprojekty/files/65296305291.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082d24052afa---49427449872.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/msjp5o0e6saqqgiu5mfd6td7d5/7232814004.pdfIn PDF document text
    • http://chaitraglaze.com/uploads/88008503076.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607425831ed39---xixoluzerewipixexopifap.pdfIn PDF document text
    • http://ghalemdi.com/userfiles/file/zimiduzetavakowavixibafeb.pdfIn PDF document text
    • https://miaousland.fr/ckfinder/userfiles/files/supikuxumegizebagowep.pdfIn PDF document text
    • http://plusk-car.com/js/upload/files/jadaniletiledujoxupofes.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16087d80520d12---modafutuvawepopomutamoli.pdfIn PDF document text
    • http://sea-cruise.ru/ckfinder/userfiles/files/4627174304.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/16081345e621d0---mokewajuti.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=the+human+centipede+full+movie+download+in+tamil+dubbed+isaiminiPDF 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_off00010f9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F9E 17328 bytes
SHA-256: e1d493d6af23cbb20db652ec3a3e29b1d6ce3c7ce0ea62ba4f8f3850ff9e9dbe
font_01_sfnt_off00013cab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CAB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000154c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154C2 11140 bytes
SHA-256: 16eae0781c25d1be046a9d8df86ba56c9895dea6aa6ba181bf43888e6d34b071

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