Malicious PDF — malware analysis report

Static analysis result for SHA-256 6095cba4b19d903e…

MALICIOUS

PDF

79.0 KB Created: 2021-09-02 13:53:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4b4199f32507d2b1c2a45e10bbaddad3 SHA-1: cf85a080b4b73257110a6e8455961546a4ba500c SHA-256: 6095cba4b19d903e285431c63be4fcd7ad99746c81697e551d5d0b125bf2756c
204 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting an attempt to distribute malicious files. The presence of a 'password-protected archive' lure heuristic indicates the document likely instructs the user to open a password-protected file, a common tactic to bypass gateway security.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://laplacedesstores.com/upload/file/muxolimepipaf.pdf
    • http://www.rosabrockenhaus.ch/ckfinder/userfiles/files/gowazediledimit.pdf
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f9281b4eb26---ropipovojananogudu.pdf
    • http://accronline.com/userfiles/file/7799000432.pdf
    • http://freetourscadiz.com//ckfinder/userfiles/files/98234308296.pdf
    • http://timnhanhonline.vn/upload/files/51793439890.pdf
    • https://atasuorganiktarim.com/upload/ckfinder/files/52204161678.pdf
    • https://patoman.ro/ckfinder/userfiles/files/67117375851.pdf
    • http://bdnchem.com/upload/files/nemarotugezogiruvelig.pdf
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/racob22hhm5fn16s5681dfrabd/dupukuf.pdf
    • https://bustotoronto.com/userfiles/file/87767868717.pdf
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/991d27a5bc2e5707fce661c99f68fb11/24701375274.pdf
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbaaa353b1---59306548921.pdf
    • http://nfraccon.org/userfiles/file/jikuwiwat.pdf
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4212fce8b2---46787333684.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/f2164ad478f9b7b5ef2e3c28d55bcc4e/16841286713.pdf
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb1a693de1---53125952503.pdf
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac0e37d74c---82810429599.pdf
    • https://rumahbaruku.com/contents//files/dexekuwarozojokogu.pdf
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608db158cc5fc---4841315849.pdf
    • http://j-club.eu/userfiles/file/75386018484.pdf
    • http://jenan.com/ckfinder/userfiles/files/tavip.pdf
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607d497ca1642---57783633633.pdf
    • http://snotlicker.com/clients/10243/File/pasexesozubu.pdf
    • http://tscyw.net/userfiles/file/20210726124410_sd3viu.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=download+pdf+reader+for+windows+filehippo
    • 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_off0000d200.bin
ad725b3f7ce552b6ec36a071721018a052fb72748fd4ceec32853770b9ebdc1b
pdf-font-stream PDF embedded font (sfnt) at offset 0xD200 17268 bytes
font_01_sfnt_off0000fe3f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE3F 16792 bytes
font_02_sfnt_off00011656.bin
4744c4c9c81185fe03285d9fe234f049eb839b5fd5aec33431b39e977e9e395e
pdf-font-stream PDF embedded font (sfnt) at offset 0x11656 10584 bytes