Malicious PDF — malware analysis report

Static analysis result for SHA-256 04264dc7481b66e2…

MALICIOUS

PDF

83.7 KB Created: 2021-08-09 06:21:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7e7df5034300e0db2649d04250c297f1 SHA-1: b8026c2edd0ce5a550bfb671fbb46f2db6e29063 SHA-256: 04264dc7481b66e293079b4410aa212a0c164ed04ab8ecd5d08f75645f75309e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous links pointing to compromised WordPress upload storage and other disposable hosting, suggesting it functions as a link farm to distribute malicious content or phish for credentials. Although no scripts were explicitly extracted, the nature of the links and the detection indicate an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/b8ba4d5e27e7e8d565b6de73eeddf788/27017463429.pdf
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a171c7218c---31012616021.pdf
    • http://drivingschool-brno.eu/files/natiza.pdf
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/37fd8956c4c31fbe4765f14fb7d3428b/13462249200.pdf
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b989074a3---sifomuxoponebibisa.pdf
    • http://homeopathyhongkong.cn/files/22823518553.pdf
    • http://sushikyototogo.com/uploads/files/pevijatu.pdf
    • http://jlm-kg.com/uploads/file/70160525843.pdf
    • https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/70b699d99bf96e316d2ccf6cfc73a831/33433276124.pdf
    • http://chrisdepanneservices.fr/Sites/cds/files/8113137172.pdf
    • http://pileshoppen.dk/userfiles/file/nisulaxo.pdf
    • https://h1t-url12shio-turbo.com/contents//files/woxakunutixigalemixa.pdf
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a57f10f0237---87306899943.pdf
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a22ceb560b---65337370772.pdf
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0fccae5306---wuganisojefomubipura.pdf
    • https://diedacorporation.net/freesiafiles/file/42131615144.pdf
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160817fd835840---zexadosumagaloburenufube.pdf
    • http://karpatskiles.ru/store/file/74695661591.pdf
    • https://deltarents.com/upload/ckfinder/files/55555313291.pdf
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9e6355244aa19940338bc23b7f33ae9a/lulamifibumesuxijegu.pdf
    • http://askort.pl/Upload/file/3085946221.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=god+of+war+4+psp+cso+download
    • 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_off0000e320.bin
75089bcc070f761b3651525e145de4e0dfa1e93e065f186fca37839d5a1de39d
pdf-font-stream PDF embedded font (sfnt) at offset 0xE320 10492 bytes
font_01_sfnt_off0000fb3e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB3E 16792 bytes
font_02_sfnt_off00011350.bin
c10da0df30e0ceca24113ea05ce980f95b68fd62905c018a4a16cb39be096023
pdf-font-stream PDF embedded font (sfnt) at offset 0x11350 18008 bytes