Malicious PDF — malware analysis report

Static analysis result for SHA-256 17cab07c760e29c3…

MALICIOUS

PDF

85.4 KB Created: 2021-08-04 17:58:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ea4d9768ed99228117742b63cc5e09c1 SHA-1: 249e92eb5fa259c4339e65971bc42dff23c6274e SHA-256: 17cab07c760e29c3c7bbc86ff6be7ed5188d702b501d07e99604778fc647dd5d
156 Risk Score

Malware Insights

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

The PDF contains numerous links to other PDFs hosted on compromised WordPress sites, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6476e9d4cbd0492ba64edce5d710aa9b/vamapafez.pdf In PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/g4agn1hqssv919a8kbdanuc330/nadajufalevoniro.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/f3294381387c2aa6c931acaa5a1a4976/1504452401.pdfIn PDF document text
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/efbc05e0175c401693769e6ab90729f9/xiburulodujegileforad.pdfIn PDF document text
    • http://jgbt.us/pds/userfiles/files/95808760309.pdfIn PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/66ffa2b401fb8a4e0d554d9eb762f69a/gijudowuxuzikezilaj.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/f25e91edae6e890c9371f13cedec6185/96562502424.pdfIn PDF document text
    • http://grawerlik.pl/userfiles/file/92811788843.pdfIn PDF document text
    • http://deryalvincotokurtarma.com/userfiles/file/darowuwugabomuxuvijapuli.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/dc93d4ab9e6ea1366c35487b0b47f6fe/depipanisupubilukab.pdfIn PDF document text
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/8698c6ee16774f542f6cecc5d3639397/51119650368.pdfIn PDF document text
    • http://creativeindustries.ru/uploads/userfiles/file/wadobesu.pdfIn PDF document text
    • http://rajskiewakacje.pl/userfiles/file/mofuxanizefo.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/filawedebiderotabubabob.pdfIn PDF document text
    • http://www.motionmantra.com/userfiles/files/gagixivulamomatepunuru.pdfIn PDF document text
    • http://shop-cartuning.pl/userfiles/file/vonutuworetimufadibef.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/5afcf18e421fcae7dbe2062554434c7c/mogaxit.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160e330ea40d1f---11131918739.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c955789d58f---kilakatakevifaj.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160a3e570e0680---93265908109.pdfIn PDF document text
    • http://metallpress.info/files/zexukuwam.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b08bbc8be85---40184933553.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/b39b0791b32c0633789772dc94a0f0c7/26264910534.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/0b60a559481119ba387b2b9d70fd2ce1/34133118157.pdfIn PDF document text
    • http://markfarolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/redirogubowuwone.pdfIn PDF document text
    • http://cieplej.pl/imgturysta/file/jogebivofegigep.pdfIn PDF document text
    • http://gidaero.com/upload/fckeditor/file/visasudasizovuf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=tamil+love+failure+songs+zip+file+free+downloadPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e66f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE66F 17900 bytes
SHA-256: 225b98198d3f6a85fdc0cfd67ab35e66db759f597897f9d81d674b4a4a563ee4
font_01_sfnt_off00011607.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11607 11020 bytes
SHA-256: 33dad423689ae6f46e54796be35370e775f345eafdaf7874413960008a7ecd15
font_02_sfnt_off00012f80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F80 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1