Malicious PDF — malware analysis report

Static analysis result for SHA-256 68e892d0e348db6f…

MALICIOUS

PDF

77.8 KB Created: 2021-09-17 22:30:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 749b1d1212fbf807d67d071e4225dc53 SHA-1: 2bdab9dfc2f9641c79a8244b55d81e8d582d8162 SHA-256: 68e892d0e348db6f0e2d06f1ec55c58b67988b4bbd4b72306c56d176ef71d130
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV detection. It contains numerous external URIs and link farms pointing to compromised WordPress upload storage and other disposable hosting. The presence of these links suggests the document is intended to redirect users to malicious websites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://philabc.ru/uplcv?utm_term=convert+apk+to+jpg PDF link annotation
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/161393eda3d6d4---57112538682.pdfIn PDF document text
    • https://doina.md/fckeditorfiles/file/24666021949.pdfIn PDF document text
    • http://world-housing.jp/ckfinder/userfiles/files/91812370352.pdfIn PDF document text
    • http://cegled.varosom.hu/userfiles/files/fugefamarerena.pdfIn PDF document text
    • http://newo.ru/files/files/refulowuxaf.pdfIn PDF document text
    • http://esipro.fr/userfiles/file/88301671428.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/7ed3022731cdabb86345590b5e3682a5/64624290066.pdfIn PDF document text
    • http://jakpaisanestate.com/images/upload/files/mifolarizulalodiluf.pdfIn PDF document text
    • https://tierrettung-in-katalonien.org/ckfinder/userfiles/files/80798240009.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613e586f013c0---23317848562.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16132c27d0752f---39835988340.pdfIn PDF document text
    • http://ibrahimabuomira.com/ckeditor/ckfinder/userfiles/files/zaritazajatubinepisalivum.pdfIn PDF document text
    • http://unsersohn.ch/images/file/36515529894.pdfIn PDF document text
    • https://www.sherpachristain.org.np/ckfinder/userfiles/files/50826285242.pdfIn PDF document text
    • http://vaithun.net/upload/files/42682193194.pdfIn PDF document text
    • https://ratosatu.com/contents/files/pedufuxopodalaf.pdfIn PDF document text
    • https://liho.cz/UserFiles/File/46981448022.pdfIn PDF document text
    • https://alkathirilaw.com/userfiles/files/gusoreledi.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/mabesowifonew.pdfIn PDF document text
    • http://ratchee.com/ckfinder/userfiles/files/vojovekilopita.pdfIn PDF document text
    • https://bayihoki99.com/contents/files/lewasoziwivilibowiganoti.pdfIn PDF document text
    • https://bhavanarayanaswamy.org/userfiles/file/44659680939.pdfIn PDF document text
    • http://smolensk-bakaleya.ru/userfiles/file/21582217593.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cdc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDC6 17020 bytes
SHA-256: 7cace216fe1dc74dfc55d87ccdc126e0914dda136285c1d24965192b32ad9624
font_01_sfnt_off0000f9db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9DB 10440 bytes
SHA-256: 00737e84b95d9944b81bc1cc7cbf20bb3062e4639378422929bd1ff1fc7314ba
font_02_sfnt_off000111c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111C4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1