Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c19913e5ca587e5…

MALICIOUS

PDF

164.5 KB Created: 2021-09-02 18:00:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 13d49515ae6f274deddc2b8b7942f3bf SHA-1: a2daab11af3f820f172503ae50db886a160f9380 SHA-256: 9c19913e5ca587e5408960204d5fd78d4b0a73075a14804df5c245005988ac2d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely involving exploitation of PDF vulnerabilities to execute further malicious code.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 http://cimkezes.hu/uploads/ckfinder/userfiles/files/degikewutefasalagup.pdf In PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097c67642fbc---pogodubesogekivuva.pdfIn PDF document text
    • http://rw-hse-businessconsulting.de/userfiles/file/66692870558.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609c77596f2a1---6557208795.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071b098c44bf---danikegelotuzuw.pdfIn PDF document text
    • http://okeefesreef.com/ckfinder/userfiles/files/xiluzadanozuxefatamudul.pdfIn PDF document text
    • https://www.treehousecare.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f37b013d09---bazeferivuf.pdfIn PDF document text
    • http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077b09e4a1d7---30829623618.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099ba277d8fa---bavikusana.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/32012718974bc5df8622c515fa3a044a/bepekalumokelatit.pdfIn PDF document text
    • https://noihoithanhtuan.com/media/ftp/file/kejubune.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16098c68bc42ea---dugerefaso.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/baf2f6730136443f5956346177ba3887/gowejezuwitixeti.pdfIn PDF document text
    • https://gadd-asso.org/userfiles/file/vodilalibavajemux.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16102f8645f351---diterododosumazemovuzeni.pdfIn PDF document text
    • http://apcmagon.com/userfiles/51864654474.pdfIn PDF document text
    • http://www.gonouvellezelande.com/files/zobuvafasabojejafusulifug.pdfIn PDF document text
    • http://indyskischool.com/ckfinder/userfiles/files/tebuxodaxexiweserolo.pdfIn PDF document text
    • http://bekkercoon.ru/ckfinder/userfiles/files/noraxuwefarojerukoxiwik.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1608fde5919ff0---torozebobituzij.pdfIn PDF document text
    • http://kokocurry.gm/userfiles/file/45250457425.pdfIn PDF document text
    • https://uetty.xyz/js/ckfinder/userfiles/files/kogetini.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=angeles+y+demonios+monse%C3%B1or+alfonso+uribe+jaramillo+pdf+gratisPDF 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_off00021460.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21460 22448 bytes
SHA-256: 562a367f6f458e6c931b5484b6a3909268708d258e5419c0b7140890714fd765
font_01_sfnt_off00024db4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24DB4 11512 bytes
SHA-256: 38fe902e54718490652a17dde1c428f29c18ccce8e35ae5d3e6b65f488d4145f
font_02_sfnt_off0002684d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2684D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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