Malicious PDF — malware analysis report

Static analysis result for SHA-256 41200e349a52b28c…

MALICIOUS

PDF

115.6 KB Created: 2021-06-29 03:33:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ae792692f0e1ba4463a1d0e3d8a40d8f SHA-1: a618c3ac3040771fd3632c980da4e70203a7c5d8 SHA-256: 41200e349a52b28c2057d1dc1da87f4c91c9300d3aff1b38b543e25d0222a74b
176 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress installations and disposable hosting, suggesting it functions as a link farm to distribute malicious content. The presence of a raw IP address in one of the URIs further indicates a malicious intent to direct users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e9c8e545ff---55276811132.pdf
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/bd636aed80ac3a1e30388e4d843abb87/56566132523.pdf
    • https://blagoustroystvo24.ru/ckfinder/userfiles/files/limajebusatokafuvative.pdf
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0272acde25---14554088422.pdf
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609544acc63d5---zolexafarufedixotuwatodem.pdf
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160c9b9366ae6d---28113159499.pdf
    • https://satybharat.com/ci/userfiles/files/77223583273.pdf
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076c8ad52e6a---21775376090.pdf
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/8c2a84e61a9390ec3b9de0265812020a/91143858704.pdf
    • https://xn--80aanugxqi.xn--p1ai/admin/ckfinder/userfiles/files/89912614660.pdf
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607359d6ebced---bepivatugi.pdf
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c16c6756473---jimisofukenizefebat.pdf
    • http://ampletrekking.com/userfiles/file/jukexugav.pdf
    • http://bomtvplus.com/data/board/file/20210530050340.pdf
    • http://files.ibiza-ferien.de/file/jividaguzezukepif.pdf
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/il73hnedsh60ue05iflijp1tvj/16862624694.pdf
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/6kg7s8memoq9gmthmig2832n0c/nawusawi.pdf
    • http://dochoiotovn.com/uploads/userfiles/file/befunobadolamubatilix.pdf
    • http://gibisch.org/files/files/zerurerosifatorirukug.pdf
    • https://cairparavel.ro/app/webroot/files/userfiles/files/tevejitinibujodonef.pdf
    • https://peterdegendt.be/file/32303588569.pdf
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/b462e8e1713d4a90ee1639ea2b795a84/50337330418.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/16080be4a34521---wawomozasini.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=save+the+world+fortnite
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015e59.bin
2fd3d38d2ac83e88daea7acd36e920eea5c5d8300cbc56838d8927a087b7c543
pdf-font-stream PDF embedded font (sfnt) at offset 0x15E59 10512 bytes
font_01_sfnt_off00017643.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x17643 16792 bytes
font_02_sfnt_off00018e55.bin
23722e05aaad0f3a0109e7df9c725838c9cb2907535704d7242010a432f93770
pdf-font-stream PDF embedded font (sfnt) at offset 0x18E55 18612 bytes