Malicious PDF — malware analysis report

Static analysis result for SHA-256 db49002a07184f24…

MALICIOUS

PDF

87.7 KB Created: 2021-06-27 17:10:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7f45febe9a8d46e4aa4be8ed47bb999f SHA-1: 5aca15e842a092356c2ffabe675e8f90d6973227 SHA-256: db49002a07184f24aa1b8c01992f2cc1383f8e38f02b813398fafed6b6f7c8f3
164 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, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to compromised WordPress upload storage and other potentially malicious sites. The presence of a 'download' button lure further supports a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b7dd7a721d0---sufejoremezev.pdf
    • https://abe-rdc.com/userfiles/file/kelijakiludiwilalanepe.pdf
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2df747c6b3---73232538962.pdf
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eda9c1d399---7499982011.pdf
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084eac281b90---95384530225.pdf
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607e33c68a0ea---mufatona.pdf
    • http://cuacuondaiphuc.vn/upload/files/funilibedowanegoxofe.pdf
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/abce8b04bd61eb2dfc2238658f9bc8c8/92313083931.pdf
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/no4kb8d4ctb9llo8jqdhr4ifa6/xajomiguw.pdf
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/r6a2ip6vmifo7gnbjelr5d2br5/wezenimojuzuzudabux.pdf
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160899d6a907cf---33255022864.pdf
    • http://vds-construct.pl/userfiles/file/96657279504.pdf
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/dlj1oopkb18r43un36ak4c3ju2/jezasosonejigulusodigi.pdf
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cbfb43d673---tovunofawoxijolerinoxaxe.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160b22f6450cc3---54207094604.pdf
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/203df653008c9c62c4834d36c7f16996/vamobopiboto.pdf
    • http://ckpak.com/fckeditor/userfiles/file/dafosaniv.pdf
    • https://encoregallery.us/wp-content/plugins/super-forms/uploads/php/files/cab987b2b3ca24b8069a19285e79debd/kinusorijisi.pdf
    • http://puzynowska-kancelaria.com/userfiles/file/2554603860.pdf
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608c3e000895c---65282732544.pdf
    • http://thegreenlegacykeepers.com/clients/e/e8/e8dc17949b7ef813e9937e453902477f/File/45151370713.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=miracles+from+heaven+full+movie+download
    • http://medlab.webd.pl/upload/file/kekipebuvejujafes.pdf
    • 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_off0000f3d5.bin
432381b48ab53270c7817f00ab399522ab9153fb81c966d2a9cface5c5c479ce
pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D5 17052 bytes
font_01_sfnt_off00012037.bin
48a18c12399c97fff509af8d11e7f32188368b412596afd4fc9859d78e802c23
pdf-font-stream PDF embedded font (sfnt) at offset 0x12037 10888 bytes
font_02_sfnt_off00013941.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13941 16792 bytes