Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee6b411c8033de0f…

MALICIOUS

PDF

86.3 KB Created: 2021-07-04 13:22:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e7011595856af80afdc200d98d414555 SHA-1: f8a6bbd7e05795c18f22e51c0957306aee3bae54 SHA-256: ee6b411c8033de0fd584b14c93aa81387f987396a49bb5fc1debd6ec1cc9b312
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised or disposable hosting domains, indicative of a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites by disguising them as legitimate documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/8b587fc6209facc0caf4ee7ac23c608f/genopamizumin.pdf
    • http://www.anjhimayath.com/upload/file/86218704933.pdf
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/16091129854f05---3113859664.pdf
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1607290ae345c6---muwetiwowevabojobixa.pdf
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da3581dfeb5---26920890820.pdf
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae82e437afc---99772290214.pdf
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/68b2ac81451c607520fc44c61d7e95ec/lalogomisopidalipij.pdf
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/c21f8e2cc46d91c52b01c3ad0f240e7a/duludosikujabibunovizara.pdf
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/d2a4101211b37e1c1478e5bf2eab06ea/zevarerifalaronusiku.pdf
    • http://xz-brand.com/ckfinder/userfiles/files/34025973528.pdf
    • https://textolinguisticsolutions.com/upload/editor/file/pidejotodoketomerepofo.pdf
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/16096fee6aef97---42059023196.pdf
    • http://abwplazaview.com/uploads/files/bebuposimurepag.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/41hmcp7enu7skl9tqh79d45j36/lozesazuvujafujavagevelo.pdf
    • http://xiaohecollege.com/d/files/43898137739.pdf
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/ab7c8a6948d9e15a96e56a8a11006ac0/wufozikufawebu.pdf
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1607f0c2d6f7f4---mazudusura.pdf
    • http://hgbs.de/userfiles/file/dodugokanodiwotubi.pdf
    • https://lepjunk12.hu/uploads/files/20317141827.pdf
    • http://perles-del-beya.com/userfiles/file/72777329744.pdf
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608b9dc669653---8405503818.pdf
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/893166fa3265578b8bd1aab7c2c706f6/29989081752.pdf
    • https://agrilaui.com/userfiles/file/lavuzumatibijexexit.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=physics+book+for+class+12+punjab+board+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_off0000ee15.bin
04a369e5c9dcd2ee8915c29966550453aa7f8316d262960f34484dee2614b4bf
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE15 11236 bytes
font_01_sfnt_off0001082d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1082D 16792 bytes
font_02_sfnt_off0001203f.bin
18c984e9aaa7c462aeff701c4f24b1dbaccede8358180a40777c8330db4819e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1203F 16836 bytes