Malicious PDF — malware analysis report

Static analysis result for SHA-256 0324020470f3a985…

MALICIOUS

PDF

94.2 KB Created: 2021-09-06 08:31:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: aaab891b352ea2232b656c98fef9a8fc SHA-1: e7d060c472e904ded4b63e5b1f32602937c768c2 SHA-256: 0324020470f3a98595a4ef628ded624b1aef5436b79323ecc4ed266f06331eff
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains numerous links pointing to compromised WordPress sites and disposable hosting, indicative of a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose beyond the heuristic findings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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://garglob.ru/uplcv?utm_term=kinematic+equations+p2+worksheet+answers PDF link annotation
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/16072890e41e4b---21736822373.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607469174ffef---mevadekadidawizo.pdfIn PDF document text
    • https://artbynela.com/uploads/file/22126680156.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/84383a6dc0fae77393f1b37f50be914f/zafimozip.pdfIn PDF document text
    • https://ebooksweb.net/files/file/sazewupazotexaxoti.pdfIn PDF document text
    • http://muzeumostrowiec.pl/obrazy/file/65123803412.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/55ebba1846a0af76cb63bb77e0de50a8/medesovedi.pdfIn PDF document text
    • http://keitbg.com/images/files/88429348016.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/gd58qcn4lqh7bsorss8pfd3khp/xiluburuzo.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/c44a4319d8373e6c091c8bd44a5e4e70/57411721993.pdfIn PDF document text
    • https://floridagreatescape.com/media/file/xoxadatojadijet.pdfIn PDF document text
    • https://aicpwdosaeast.com/ckfinder/userfiles/files/tafekifajotov.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/951699e5b0beae25fa29526e9d8746f7/tavabubipo.pdfIn PDF document text
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2a315fc02---55527112570.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7b3aa47520---9526126899.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/u7311rp1n6derlomvm52il3io2/fewaruxijewowewodapapase.pdfIn PDF document text
    • http://anipetkingdom.com/webroot/img/files/71848096282.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/500dd68b8cb99ab2f9c8fac96ae98acf/gitimikesafifikupoge.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/218746df078effdabab57e4760868df4/tegesaw.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/05963e6d61f0ea3f4501e8fa72cf0198/15855201456.pdfIn PDF document text
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076f5a063c52---46515367457.pdfIn PDF document text
    • http://tpokebar.com/uploads/files/fizulofur.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608fd56ef3218---69765000252.pdfIn PDF document text
    • http://classicalgardenfountains.com/uplds/file/fojorexizudo.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_off00010931.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10931 18584 bytes
SHA-256: 79fe59b590ce8908eba3c3fc01fcfd338f845a0ab22c09924218519dcff9d02a
font_01_sfnt_off00013940.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13940 11128 bytes
SHA-256: d366180965e48fda5d73dffd1e1526c34a7047546a7322a26bd37d385521497c
font_02_sfnt_off00015330.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15330 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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