Malicious PDF — malware analysis report

Static analysis result for SHA-256 87001bfdd41a5ee5…

MALICIOUS

PDF

238.1 KB Created: 2021-06-29 05:53:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ff42d39da62a783b7bdd740bf99248e2 SHA-1: 5ac4ad0da4de82c0b19600eaac5b4eecadc7ac30 SHA-256: 87001bfdd41a5ee522d38e76c54392e58ce37204d38c754a6e143f97dbf991a8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous links, several of which point to compromised WordPress upload directories, suggesting a phishing or malware distribution campaign. The presence of embedded URLs and the nature of the heuristics strongly suggest this file is part of a spearphishing attack, likely attempting to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9868

Heuristics 5

  • 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.
  • 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://kulturazebrak.cz/userfiles/43504499104.pdf
    • https://mimpishio1bet.net/contents//files/pawolonixugawexejebojefo.pdf
    • http://allycatering.com/userfiles/mepefunubaruduzedetufu.pdf
    • https://www.sehersirin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077eba302271---91187541263.pdf
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609693824193c---jojageduvexudur.pdf
    • http://share-world.tw/userfiles/file/42259644682.pdf
    • http://coxfamilyreunions.com/clients/5/56/566bc9ad745482f371977770c3e6b383/File/6051419482.pdf
    • http://muskogeeroughers1967.com/clients/9/98/9899c641331876fb313f08ec475a0443/File/dorivipilodiso.pdf
    • http://overtonnation.com/clients/f/f9/f97855507a39dfa58978186db9bff07a/File/41260770021.pdf
    • http://bobas24.pl/Upload/file/lezixurobi.pdf
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088a29a24f41---xirozoragiduga.pdf
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b088f9b857a---48430631951.pdf
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/7mndh6gd50vdjfn1udj0l8pbr3/26348889663.pdf
    • http://fittbike.hu/files/file/33354228373.pdf
    • https://weeb.nu/userfiles/file/pitifexinugu.pdf
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083330b4f96b---miwolajubekelafubizaz.pdf
    • http://beytarimcilik.com/admin/editor_resim/file/39533603147.pdf
    • https://floraplant.gr/FCKeditor/userimages/file/zivasenoxesefobufedavaxof.pdf
    • http://sattamatkapatti.com/userfiles/file/zijojugoguvukofax.pdf
    • http://cbestdesign.com/ckfinder/images_store/files/piveduro.pdf
    • http://travelshops.pl/userfiles/file/motifugepojumageberawete.pdf
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098edf50e0d8---kotiwexubotekopu.pdf
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/a08a34c20cf6dc588bd740acb8d82106/34646116350.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=three+steps+above
    • 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_off0003490b.bin
10cee2d58ad0d0544a1fb7ea48c506305f1258be52adbe2ed4f4fac42e0fbf00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3490B 20076 bytes
font_01_sfnt_off00037b4c.bin
b9abdaeb976938ddbb82e9060bfd2a12ff621f721394739df7e53a599813fa05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x37B4C 10276 bytes
font_02_sfnt_off00039265.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x39265 16792 bytes

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