Malicious PDF — malware analysis report

Static analysis result for SHA-256 6619c9b9afada99f…

MALICIOUS

PDF

178.9 KB Created: 2021-07-02 06:55:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 34e71cf754ed5d245a0785f97f510369 SHA-1: 4cc629ed85b76ed31ed7e7ca5c9f9bdfdcfff471 SHA-256: 6619c9b9afada99fc27ecb1c5fbc4ff75615c27042a274505f1ebdba47e3fea4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous external URIs and link farm patterns, suggesting it is designed to redirect users to potentially malicious websites. The presence of external URIs and link farms indicates an attempt to lure users to external content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9652

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://allytemp.ru/uplcv?utm_term=the+legend+of+zelda+tri+force+heroes+rom
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/e4a7181a14a102cdcbd43bd38f8289e1/32040489542.pdf
    • http://hitecds.com/userfiles/file/baferujipubanabipirir.pdf
    • https://asoriofrio.org/ckfinder/userfiles/files/46871125276.pdf
    • http://espacioschillout.es/images/admin/file/vixoto.pdf
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/cf3ec4c6a2c5ac8bd194b51c41c631ad/jataravijoziwelufiwu.pdf
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/4c938bfd1350cb3380bf5a12e112eba5/75054075003.pdf
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608193b71017e---zaxaviburafagibin.pdf
    • http://2ds-creations.fr/userfiles/file/gutozax.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160945af43c64c---dusomaviwimani.pdf
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160b2b1f6c8780---67174746358.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a05663dc110---69509495950.pdf
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160b9ed5917b13---viloxesilipeditogade.pdf
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a07e25b6cca---51122129538.pdf
    • https://akanaymatbaa.com/calisma2/files/uploads/telofarotonuroxotu.pdf
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/3030245913fa83bbeb4f114d98929d29/gusowesifopadiwiwes.pdf
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/3e0be22164fd06eab964f42338fb7eff/1612366611.pdf
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609238103da40---mitoriwixopot.pdf
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bc3ed69e22---tarozeza.pdf
    • http://baschin-heizung.com/meineBilderAlbertGrundschule/file/32218320687.pdf
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d7ec3462f4d---65642609043.pdf
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/d2a7f7a1fcfecd5d1bad0a09493b6169/81806216041.pdf
    • http://www.gesas.it/media/mailinglist/file/8069760993.pdf
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ed643050b---84942978806.pdf
    • http://bahattinburyan.com/userfiles/file/moxari.pdf
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/75f12f1cd54776d07c01d63da386698f/78379347083.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00021dd2.bin
fbbdcc1df456dd274eadf94bf63ab84ac7709cda951dc55a8116cd6741322cfa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x21DD2 10944 bytes
font_01_sfnt_off000236d2.bin
6d7396e9dc1ac781fb46f52c0e6fa43090674065403dc9444566eb0ebe96d27d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x236D2 18372 bytes
font_02_sfnt_off0002668d.bin
1419bd2631398c708176a24212e42853aeb39dc6d3a00d9c32697d4d4626f019		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2668D 20708 bytes
font_03_sfnt_off0002a514.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A514 16792 bytes

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