Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee48c4340890347b…

MALICIOUS

PDF

74.1 KB Created: 2021-06-26 05:13:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 59e37206f2fbf6538bbab43c3cff4ada SHA-1: 342def3a8c59a9bc86b9fddecd0c6716a625b34a SHA-256: ee48c4340890347bf293c85159b271bbd8fa78f6391137c31a10519567326f15
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure itself facilitates the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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 http://billedbutikken.dk/articlefiles/file/67069793826.pdf
    • https://soechi.com/userfiles/file/wuwinonelolilutesusi.pdf
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608337132752f---suruwunawuvolesuvosavibuj.pdf
    • http://bagumul.com/file_upload/spaw_upload/file/20210519183158.pdf
    • http://andrelandberg.com/userfiles/file/58827900468.pdf
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160ae10807754c---roxoradubezuz.pdf
    • http://capri.lt/userfiles/files/werinirosevilanimat.pdf
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/b54ssdn9j61rmci61cvalbg7d7/latoxesu.pdf
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc3f9ae9cf---41323945233.pdf
    • http://www.srijonihealinghome.com/fckimages/file/lenuz.pdf
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160701b1e6097b---37741008290.pdf
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/504919f9fd58558c485018bc61f0685e/50760873470.pdf
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16089a42fb56e6---vabejules.pdf
    • https://goez3.com/10005001208290177/ckfinder/userfiles/files/86401054123.pdf
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/16082a4b825a54---41962757172.pdf
    • http://artistalexanderkanevskyroyalshakespeareglobetheatrelondon.com/clientMedia/file/mosax.pdf
    • https://wulf-sanitaer.de/wp-content/plugins/super-forms/uploads/php/files/os2knvtqooouauub8b80hi7qcd/vonemefutejowug.pdf
    • https://aartipalette.com/userfiles/file/daperisenane.pdf
    • http://myjobcareer.net/userfiles/file/2021062609124473499.pdf
    • http://tamlaproject.com/userData/board/file/revesop.pdf
    • http://csc020.com/userfiles/file/20210621122821_y3dywn.pdf
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/db2f1a83b19fb0614e6907318647d173/figemafa.pdf
    • http://arohitourandtravels.com/userfiles/file/midilijuwum.pdf
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16071c3ca20e7b---17460792000.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=dilwale+sarukhan+full+movie
    • 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_off0000be2d.bin
73c58f215669066c00b03475d5469c14584aa9ce4652b56acba2f8fe7dfb1889
pdf-font-stream PDF embedded font (sfnt) at offset 0xBE2D 17768 bytes
font_01_sfnt_off0000ead9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD9 16792 bytes
font_02_sfnt_off000102f0.bin
569c17c95f903443c767ca6a1b8af0a3588324e179368d3cb26983fe63370134
pdf-font-stream PDF embedded font (sfnt) at offset 0x102F0 10728 bytes