Malicious PDF — malware analysis report

Static analysis result for SHA-256 573d4ae8b3ade082…

MALICIOUS

PDF

100.7 KB Created: 2021-06-30 08:21:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5d3176f56f1deeaba5495c9af75f6632 SHA-1: d0f7201e9af940f53c324e7fe4458dffef3d7cb0 SHA-256: 573d4ae8b3ade0822e364b47e63698ab83bafe92037c4eaf97114254a40d6cef
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 links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

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://wastran.ru/uplcv?utm_term=right+angle+pythagorean+theorem
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/bma5atpm3tf49hmpqa6rlao0lvk3t0b3/44620778630.pdf
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d5c2b9ba40b---27873939888.pdf
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/rdtrse31jh0sdvokhooqhjibqv/vopilekijugoreretipape.pdf
    • http://4grd.com/cmsimages/file/mimaramivukuzuzered.pdf
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c92ef6e93b3---pajifupogiwowulanimelegez.pdf
    • http://alliance-ic.ru/uploads/file/34281036198.pdf
    • http://curry-box-deluxe.de/userfiles/file/demom.pdf
    • https://grandhotelbulgaria.com/userfiles/file/18655069126.pdf
    • http://aitrans.cn/UploadFile/file/F1202106101156479636.pdf
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/7qde3hgkbchcv2kgco8455fed3/kovatefumopif.pdf
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607abb4c09e9e---finefefasitibukop.pdf
    • http://stuarteisbrucklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jalatikefunasimunar.pdf
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/0376d561c74e1ecd7b8b050680f98689/nekumu.pdf
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/320cfe970d84a11a128bce8e42eeea7b/95522837902.pdf
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606dfee490c9c---63147270141.pdf
    • https://holocaustresearch.pl/nowy/photo/file/zonojipe.pdf
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/0qil82fc6t9ckjoidr4muune10/98553649634.pdf
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a97de120cd0---38360570732.pdf
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609456355e347---16396519186.pdf
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/c26b6d6141d6a291999f8707034f5bdc/puzusudigiwezew.pdf
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/593263d423765967805754c1c840fddc/jakudefudovaxifedojikugo.pdf
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/e9932d0aca6eff2c356206133fa8a564/gevukubabuwasagefanifom.pdf
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bc60b9a4184---54005817874.pdf
    • http://thedewakohchang.com/image/upload/File/1975272959.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000122ee.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x122EE 16792 bytes
font_01_sfnt_off00013b05.bin
649bdf6dc945921dea936a67aa6eca992dd15ca1b031f91f35c36656bfcc6750		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13B05 10692 bytes
font_02_sfnt_off00015350.bin
ea14b1026ce806fe65c2a7d7c6695f847356190b6166948f37a2e1d3f9b2f3a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15350 18868 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.