Malicious PDF — malware analysis report

Static analysis result for SHA-256 aed17d052319ac2d…

MALICIOUS

PDF

89.6 KB Created: 2021-09-01 06:13:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c297e964dee5db3c3a6157a48d1fc29c SHA-1: 0ad3695e9f4c51c25ea28a915f002cc408c70d88 SHA-256: aed17d052319ac2d2176ecdc7c1866c6160cd0956df4a9376b0ba0af9600fa05
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with many URLs pointing to compromised CMS upload storage and disposable hosting. The embedded URLs and link farm structure suggest the primary goal is to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • 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.
  • 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://pixomot.ru/uplcv?utm_term=starbucks+going+global+fast+case+study+answers PDF link annotation
    • https://combrooncom.com/contents//files/feketutijudedasi.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c0e431aa4b9---4345985918.pdfIn PDF document text
    • http://ifa-astrologie.de/userfiles/file/rakiridoxuboriza.pdfIn PDF document text
    • http://clinicaveterinariaalbese.eu/userfiles/files/xubosubujem.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16076e6fd1d9cb---55843377192.pdfIn PDF document text
    • http://radfordhsclassof1970.com/clients/878146/File/79995438352.pdfIn PDF document text
    • http://jadeite.ru/images/file/faxukirokuni.pdfIn PDF document text
    • http://efuturesthai.com/uploads/file/65539292360.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/578h2dbb400i19l9uca4ts1bc7/20483964952.pdfIn PDF document text
    • http://dominopark.pl/public/upload/ckfinder/userfiles/files/88412432922.pdfIn PDF document text
    • https://zohopinler.com/calisma2/files/uploads/dijipudatupaluxaz.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1073d69ca2---37558000877.pdfIn PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/aa19e3e3811ec3299547ae40b129dbca/baginifoxerigawix.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f69bbae295---47511478449.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/3e868d348197df631662131429d0fbf6/pakenafek.pdfIn PDF document text
    • https://fenixfalt.com/userfiles/file/sijozuziriku.pdfIn PDF document text
    • https://ubitanduk.com/contents/files/21872820563.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1610066d449890---69628738443.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc9e2e5007---7152365146.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7d9b2bd3f5---wanedukebotoxojiwufitab.pdfIn PDF document text
    • http://nurugelexport.com/ckfinder/userfiles/files/sogowanefoxij.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/38188755e0664288e3963930ffd08039/74713681087.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099c7cad606c---35878464587.pdfIn PDF document text
    • http://mc-opony.pl/files/file/vogugojebalovitujanixubep.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f75d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF75D 17776 bytes
SHA-256: f0a5e096da219ed0a7da0d05550256636c20e7de2089d4cf0aa81796996c08e2
font_01_sfnt_off0001260e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1260E 11256 bytes
SHA-256: e2d9a19074300fe7c08876198c0b7d64d7c14c614d69629a59dc565e6a927409
font_02_sfnt_off00014073.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14073 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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