Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddbc753367802dd9…

MALICIOUS

PDF

85.7 KB Created: 2021-08-20 04:55:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fda4fed1b025859353b63cf208f5597b SHA-1: 85dc86317d7c2cf6febf2a21e3e63c04f0a72836 SHA-256: ddbc753367802dd96e7ed6dcf212c6febbbab78a2d37f2729d63d162a5195fac
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, many of which are hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document's structure as a link farm suggests an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/c18a273d0d68a07daa12774782a1beb9/fuvobew.pdf
    • http://noahmission.org/dataroom/file/tezovejumetofede.pdf
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff4fe1669e---bidunofuxuzopovuzojulegu.pdf
    • http://poltinik.ru/userfiles/file/pejedifedadul.pdf
    • http://ucinnovation.ru/admin/ckfinder/userfiles/files/budezodo.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/dfg9818jrfsqfahtd6t15148q4/31536874010.pdf
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/7fbdc8163e54ef110bb265753d6697b5/48773004476.pdf
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/htmr6t2dgu74ol4hajrrhfoabf/47593263156.pdf
    • http://esoftland.com/userfiles/file/94118229259.pdf
    • http://lycee-elm.org/userfiles/file/vorevisotifadifagu.pdf
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608ff63d26ce2---govinukiro.pdf
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb01d41dab---52662502112.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/2ceba587ec4fa7cabdc3558ce139e04b/xosura.pdf
    • https://pk-kuepfer.ch/ckfinder/userfiles/files/zavolobepepoto.pdf
    • http://bacvietexpress.com/upload/userfiles/files/79152870764.pdf
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608979b94045c---dudofel.pdf
    • http://geriatriccarenewjersey.com/userfiles/files/80705404321.pdf
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608b841ea2d77---23478232648.pdf
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16088dcf436fec---62723900198.pdf
    • https://almondzwealth.com/administrator/imagetemp/file/nijikigidit.pdf
    • http://novussiteyonetimi.com/uploads/file/lulenoseziga.pdf
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/c6fdea841d26ad1f719b04c338742d3e/jeminifixudanaw.pdf
    • http://bennett-legal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/36367779992.pdf
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/bc78d6feb07a54a7ffc82419d9317a41/33540242558.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=chicken+invaders+5+cheat+keys
    • 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_off0000df79.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF79 16792 bytes
font_01_sfnt_off0000f790.bin
0884d50c57dcebb2196fa22ad98be0af14c33c6be30e407d87b1b0c6f5340943
pdf-font-stream PDF embedded font (sfnt) at offset 0xF790 10736 bytes
font_02_sfnt_off00011048.bin
3e54697433f258519e59b5d4193970bd3702f67e639bb31f2dfcde737eb7fc9e
pdf-font-stream PDF embedded font (sfnt) at offset 0x11048 1728 bytes
font_03_sfnt_off00011871.bin
1a376e87ac0721506ba7f8f901acdd60eb321b6802bc305d01df564771fc7eec
pdf-font-stream PDF embedded font (sfnt) at offset 0x11871 18416 bytes