Malicious PDF — malware analysis report

Static analysis result for SHA-256 d04c7ca4140ea6a2…

MALICIOUS

PDF

83.7 KB Created: 2021-06-27 12:08:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 81b20fd52e5b81b78cc55ec0e904b8ce SHA-1: 2ee6e1300f29bbbad8842e4bcfb747b7123fd94e SHA-256: d04c7ca4140ea6a29423386d1e16237fdb5868f19a2160b99ccc044b2ea1a3b1
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV, indicating it is likely a phishing or malware distribution lure. The file contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting an attempt to redirect users to malicious content. The presence of a link farm on disposable hosting further supports this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://synerhu.ru/uplcv?utm_term=thrifty+turks+and+caicos
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/vcqlevia63hli2q5k50kvddhlk/79432788600.pdf
    • https://tecnicadovolante.com/images/file/raravidovu.pdf
    • http://zartmobilia.com/userfiles/file/20210608050654.pdf
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/a696ad7df16e24ab27f205ee2fee5cac/30590930479.pdf
    • http://synowka.pl/galeria/file/votapodaxewelemosubawu.pdf
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ba4caa4d74---xitofamozirivi.pdf
    • https://seataclighting.com/wp-content/plugins/super-forms/uploads/php/files/77b48e5d81bdba79ce1170272d65014c/56734992630.pdf
    • http://aiswaryamatrimonials.com/fck_uploads/file/23820349949.pdf
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/57620aaf21cbe3befdc90068c2291fd1/61851799623.pdf
    • http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/kabemibidatiritowenuzitu.pdf
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/763c0a4d5b97e3a5b9b54272f305b4ee/95191292820.pdf
    • http://lakesideterracecondo.com/clients/41361/File/matozekimu.pdf
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c09e8d9b48---12490404038.pdf
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096071d78693---vitasokaxas.pdf
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b6303a62705---zisajekudivizikobola.pdf
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095f5929f6ce---40140377851.pdf
    • https://www.propertyadvisersaustralia.com/wp-content/plugins/super-forms/uploads/php/files/1c867441c00dae2cb4969b53deffb9be/tokulipaxonukesonogeka.pdf
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609bcf199abe9---pidasolokogoza.pdf
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8ad6d4bfb---xotokamekosowomabuxedatol.pdf
    • http://ufnk.fr/app/webroot/files/file/tesuxunijumab.pdf
    • http://shs1977reunion.com/clients/41590/File/46538441522.pdf
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/16085747564873---65232264077.pdf
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609511af04eac---25849132035.pdf
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/7ddcca2ffa728d382f30a04b03fab3bc/80511221942.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_off0000e32e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE32E 16792 bytes
font_01_sfnt_off0000fb40.bin
1dd52c409f67da1cddcd02edfc65af8597728f0b147c90610ee43acd7e26288b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB40 17988 bytes
font_02_sfnt_off00012984.bin
875bb1ffd67b2ecc974052f813bbbbfebcb0a6cb0e3a8c24361a232414cccbfb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12984 10664 bytes

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