Malicious PDF — malware analysis report

Static analysis result for SHA-256 d80323b3eaf3816d…

MALICIOUS

PDF

87.7 KB Created: 2021-06-27 11:00:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 36f47994978859227960a2cc4c3a03f9 SHA-1: da7cd72eaf4c001a26a442030e52007244ac2e43 SHA-256: d80323b3eaf3816dd6d1889e0a5736365c234101ee7562b47849a5ef37f2de13
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised CMS upload storage and disposable hosting, suggesting a phishing or malware distribution campaign. The file's structure and numerous external links indicate it is designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://philabc.ru/uplcv?utm_term=one+two+three+four+let%27s+go
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/16076eaad16649---5424895214.pdf
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/0c90aee1c7c54be6e020a4e856570dd9/favagubutubuj.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/555345a4655f99fe2e12d399201b0aa8/93144343202.pdf
    • http://ozari-ua.com/files/file/buwota.pdf
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094747e00d86---kivuwivurarogefowuwuk.pdf
    • http://ttccid.com/userfiles/file/xanidelekakivuz.pdf
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/3481261b63acf7fa57ccdb2d223ff9a8/20549147000.pdf
    • http://hubbardfamilycircle.com/clients/62940/File/21036566115.pdf
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b62496e6190---fekaji.pdf
    • https://semut73.com/contents//files/zakadajupijarapadusepujaw.pdf
    • https://speeddating.lt/speeddating/ckfinder/userfiles/files/49261151023.pdf
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/6ed8377c25f037d39781a32bedd11601/kegelovinomefezisibomajar.pdf
    • https://imagebeaute.fr/userfiles/file/paketazigexedume.pdf
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608b519c584a7---57415949397.pdf
    • http://crocepadrekolbe.it/userfiles/files/98169757374.pdf
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c4ec817c273---wefebigotakewap.pdf
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b777d64d0f6---sifugemavagezatovoloba.pdf
    • http://dienmaythanglong.org/uploads/files/44299624721.pdf
    • http://frangarcia.eu/upload/file/bitogudibiruxabi.pdf
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a11b3782b15---1454616764.pdf
    • http://ncabhsa.com/clients/875427/File/teluxonoseraxogixokep.pdf
    • http://gemculture.com/userfiles/file/3685093257.pdf
    • http://aelma.com/sites/default/userfiles/file/81547395945.pdf
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/9ba02d9d0a1a627cd533eb6c10e0ab25/doxem.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_off0000f31d.bin
81438dc8188b94eb1f11debca207bc42af76a63b718d1aa9e1ef9753e6d6b564
pdf-font-stream PDF embedded font (sfnt) at offset 0xF31D 17788 bytes
font_01_sfnt_off00012194.bin
e1887fb0bed2b497722b64f2f17ecd5213080696c81c38410484bbeba4a491e4
pdf-font-stream PDF embedded font (sfnt) at offset 0x12194 10484 bytes
font_02_sfnt_off0001398b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1398B 16792 bytes