Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcd3fcb882db0e59…

MALICIOUS

PDF

92.5 KB Created: 2021-06-30 21:01:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d3dd8a39dab1edbec62b11480385a1f6 SHA-1: 53efcd68856625fcaddef8891c74c618b0e321b4 SHA-256: dcd3fcb882db0e59ce80aa38ea1cc8c4ce1ad657fc063ee8f165dc63896ee442
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised CMS upload storage and disposable hosting, suggesting an attempt to redirect users to malicious sites. The presence of external URIs and link farms indicates a likely phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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=spilling+the+tea+meaning
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/0947ea743add1fcf742640f0e518c2a3/94028293850.pdf
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a21c9c19704---jeworajuzakivamadojenode.pdf
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16093b7fe50256---ruvojogabupefofijo.pdf
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/16079b2550fdda---gibebanisiwima.pdf
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/9r9229h3gmogt7t94cc0b3lfsr/14123766748.pdf
    • https://kisikana.hr/userfiles/file/83004467309.pdf
    • http://alexanderkanevskyartistbiography.com/clientMedia/file/5771763053.pdf
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1607919cc52cef---taxinemeninekikigefoba.pdf
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160ba0457d6329---58053199724.pdf
    • http://xn--2vxr09c6mc.tw/CKEdit/upload/files/52847650718.pdf
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7b20947a68---50518341849.pdf
    • https://birotex.rs/images/files/tivifobisokopitorube.pdf
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160895ef71bbad---liximilisusowin.pdf
    • http://abwcoliseum.com/uploads/files/zaruzabisilakekarepise.pdf
    • http://sebatmakina.com/files/65615391978.pdf
    • https://keluargamimpi2.com/contents//files/16919587212.pdf
    • http://berbun.com/user_img/file/rutozezananifejuj.pdf
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091040577310---sutamixepox.pdf
    • https://euroroma-bg.org/files/file/tobimenozajowarikujige.pdf
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160bcb0ef34a3d---lebisumidab.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/podfnb2oph3lngnruik31qvi44/94395212347.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_off00010522.bin
48026cd4f8c1fb15f4615f699f6fea70a40b5a31f06697ececa91c57a2a6b81e
pdf-font-stream PDF embedded font (sfnt) at offset 0x10522 18464 bytes
font_01_sfnt_off0001343c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1343C 16792 bytes
font_02_sfnt_off00014c53.bin
c8809708391d7b81065127ffe37e8a1179a65fc632143647b0e4c1c6054b86bf
pdf-font-stream PDF embedded font (sfnt) at offset 0x14C53 10384 bytes