Malicious PDF — malware analysis report

Static analysis result for SHA-256 c14ccd8e8d6e50b4…

MALICIOUS

PDF

70.1 KB Created: 2021-09-26 21:59:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 328d2ed9d7089fb47213bf059204d5c6 SHA-1: c3bcbb67fcd5caa53a4af32dc3780ad9a7d3124a SHA-256: c14ccd8e8d6e50b40bbd324faf1a27379774c08b6222ecafec94753c204d04ec
176 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and the ML classifier indicated a high probability of maliciousness. Numerous heuristics indicate the presence of a link farm, with several URIs pointing to raw IP addresses or potentially compromised CMS upload directories. The document body is heavily obfuscated, preventing a clear understanding of its direct content, but the overall structure and heuristic firings strongly suggest a malicious intent to redirect users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://www.zolmedis.lt/ckfinder/userfiles/files/38303940143.pdf In PDF document text
    • https://dongphuchuytai.com/upload/files/vafukopavokib.pdfIn PDF document text
    • http://azstorestudio.com/uploads/files/dozopikixobozij.pdfIn PDF document text
    • http://netmode.net/app/webroot/uploads/files/6073469728.pdfIn PDF document text
    • https://acrgruppe.de/userfiles/file/lazejokiwanomagutidagak.pdfIn PDF document text
    • https://heatingboiler.ca/fck_upload/file/3197804334.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/a27def2f9165719e4671fb552a55955c/jetuvijuxukajubevuxijoz.pdfIn PDF document text
    • http://topmebli.com/content/xuploadimages/file/59530273085.pdfIn PDF document text
    • http://140.121.180.103/ckfinder/userfiles/files/sasofir.pdfPDF link annotation
    • https://mbamantra.com/ci/userfiles/files/79271749472.pdfIn PDF document text
    • https://istanajp.net/contents/files/68157588478.pdfIn PDF document text
    • http://scouttautomotive.com/editor_uploads/system/files/genelukezepezir.pdfIn PDF document text
    • http://fields-on-earth.com/images/blog/file/semepobaputojarozivoze.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613916c260525---73998468366.pdfIn PDF document text
    • http://nhatnamvina.vn/rich_editor/file/jasawevidopirikizigok.pdfIn PDF document text
    • http://amindoost.ir/images/upload/files/90387268639.pdfIn PDF document text
    • http://imobilestore.de/userfiles/file/4196685492.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/ef5c39334f17ac71519ad7ee00c18b95/gawutomagota.pdfIn PDF document text
    • http://indexone.ru/upload/file/79562632820.pdfIn PDF document text
    • http://easytravel63.ru/ckfinder/userfiles/files/79051035160.pdfIn PDF document text
    • https://www.chablis-gautherin.com/ckfinder/userfiles/files/wetiwagowavozovufe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=halley+se+komeetPDF 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_off0000b0e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0E4 10172 bytes
SHA-256: 056ab1dc59b27d08ec2f7804bc49c4f7f2e7ee8d9e5de1a120be678a418f89bb
font_01_sfnt_off0000c7ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7BA 16848 bytes
SHA-256: 51462fb829d262c6bae92cacd97df8bc8fc54fb118e03c65e64750bfb903006d
font_02_sfnt_off0000f2ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2CE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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