Malicious PDF — malware analysis report

Static analysis result for SHA-256 58adee74e8492424…

MALICIOUS

PDF

94.7 KB Created: 2021-06-27 03:09:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9592d09eba728cdf2e0239c9853a17fc SHA-1: a5f913a36e1ec4e2dec1747b41e2120a6722dd92 SHA-256: 58adee74e8492424b950326a40340ff2f133fe2e32d186c7a76db0d4d773d716
156 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 with numerous URLs, many pointing to compromised CMS upload directories, suggesting a phishing or malware distribution scheme. The presence of multiple external URIs and a link farm on disposable hosting indicates a deliberate effort to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

Heuristics 6

  • 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.
  • 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://jxloanchien.com/style/postimage/file/41184617748.pdf
    • http://vervesimuhub.com/userfiles/file/wepurozabunazusipo.pdf
    • http://hokeypokeychallenge.com/clients/7/77/77ac66e313b6cb4bf602f1678accca72/File/tuwamumuw.pdf
    • http://westernmaki.com/uploads/files/37673692179.pdf
    • https://powermailer.in/userfiles/file/25931445740.pdf
    • http://beautybybelief.com/admin/images/file/21777957385.pdf
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160811d03a0c99---25010041120.pdf
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/b6dc7b74bd39afe28aa3d5c3e4c97578/22938302633.pdf
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a4cce49009---suvexixutedidufel.pdf
    • http://goldnumber.info/userfiles/file/farinizakaxidezob.pdf
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/61a2cd50c4a026867177523a86c5c6a8/riwometuxozizemoxi.pdf
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/0a9dce66210ad6396ca1e1a0f4416a87/zamikojazuwamos.pdf
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b5ee2c30612---levizenudazemux.pdf
    • https://ludifrance.fr/userfiles/file/42528845920.pdf
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/ge381m06jhh2v38o28hlafc7hq/manupumigibeno.pdf
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/c56bb6ca836d4b3b65739151fdd7d8e8/xopejexulijodewe.pdf
    • http://energo-winstal.pl/userfiles/file/najamote.pdf
    • http://apartmaji-zunicmile.com/uporabnik/file/rituwogizofinew.pdf
    • http://jtour.vn/userfiles/file/sakojetubefezig.pdf
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/0d4b996741b5ba8814807baeb50f2269/37474295543.pdf
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/df22dbcb18b4cc8b8f6d011683d09cec/11555818062.pdf
    • http://ddrwc.net/clients/869849/File/38675497740.pdf
    • http://edu-family72.ru/content/images/uploads/file/vewojukinolupelupepup.pdf
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160809ce84fdaa---40395473856.pdf
    • https://himalayanthailand.com/image/upload/File/kikupetoterekakajuzewe.pdf
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16094d37da3f5d---rovurubifogegum.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=git+push+submodule+to+remote
    • 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_off00010d9f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D9F 16792 bytes
font_01_sfnt_off000125b1.bin
c85ea1a1b7d3dc4f2adaadb2d5c9a95af538995efbf6ab262aba7a9359997a8e
pdf-font-stream PDF embedded font (sfnt) at offset 0x125B1 17856 bytes
font_02_sfnt_off0001551c.bin
9c256950f3e554fa4dffca583c2c4e153d83228213270f021b603c660a761980
pdf-font-stream PDF embedded font (sfnt) at offset 0x1551C 10672 bytes