Malicious PDF — malware analysis report

Static analysis result for SHA-256 097f02489c5447c6…

MALICIOUS

PDF

86.7 KB Created: 2021-06-26 11:30:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 76c99ef42b5aaf77552c4117ccb0e795 SHA-1: 8167e4132e6726fcfd3228f247604fdc511d1b19 SHA-256: 097f02489c5447c6c6e8a1dd73cc6efd084cae79e37e6e94602b320827d1ec79
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the heuristic firings and URL patterns are sufficient to assess the attack pattern.

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://allytemp.ru/uplcv?utm_term=blue+and+green+sunset
    • http://akcjonariusz.com/UserFiles/file/66221584678.pdf
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16097275c368a8---tenunenorabobiwakavepa.pdf
    • http://aite-materials.com/upfiles/file/supudesalelulegeboniniwi.pdf
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/063aba155b0c831796b9d675033970fd/39279898969.pdf
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/b15a1ae5546aecf2fb70f1226fa5724d/68242848944.pdf
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608f457c25c82---gamusaxuribidag.pdf
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c80407514f---tiwelulobag.pdf
    • http://cesurmakina.com/userfiles/file/3908641954.pdf
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/slvomttq3dmcani6avmsuhtpsk/fegilibide.pdf
    • http://filatelianumismaticaumbra.it/userfiles/file/88283961949.pdf
    • https://akproauto.com/nbloom/fckuploads/file/4239245748.pdf
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/16094a78e32fd1---60480989073.pdf
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/647830e98ab11725a1d621e80ac340f5/37558843156.pdf
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/50778bc2ea1b46265a8c7fd76568342d/4807063639.pdf
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/rr8ovqoj2sob54h7js2kq5hf77/sarup.pdf
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160bce04f16a31---15321623020.pdf
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/125t8hb799mq0i6fh148gtq3lj/giputewagak.pdf
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1607d27eacb582---36170565525.pdf
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/6329dcd1b7cb8360debfba3cb5cc7683/42995061516.pdf
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/4247d3d35511e6bb8243fddd3e0e0a20/sewevamejevowedu.pdf
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072bd621ecdc---dukusufilimefufoz.pdf
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5a9f2ece9d---77078271349.pdf
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/m8u86rj86uu92ed4bg8fhal9k0/rurax.pdf
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160bcf637cf73a---47640693912.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_off0000f1f3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F3 16792 bytes
font_01_sfnt_off00010a05.bin
aa62fe43ecd2859a99b79a4eb2f11f6d61512b6c71a9f7b89afd470deb75fcc9
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A05 16988 bytes
font_02_sfnt_off00013656.bin
f1af61603351d97c2828b1939f7eb2589bfe2f9b87c7d5375adb8a2f43e58181
pdf-font-stream PDF embedded font (sfnt) at offset 0x13656 10364 bytes