Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d1206ee1d0611fc…

MALICIOUS

PDF

79.4 KB Created: 2021-07-20 21:52:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e8765667d3ba40855951773356d3f567 SHA-1: 7368b09be85c9c56e6dbd5306be08a19fe99d111 SHA-256: 0d1206ee1d0611fcad68f65d635dd20e73cd162392f44ded6c08f51d6727ad54
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to websites hosted on compromised or disposable domains, indicative of a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or distributing further malware. The presence of multiple PDF link farm heuristics reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d943b6e87d2---87702243147.pdf
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160a6fbc6edf1c---pezikeboniwefumo.pdf
    • http://expertsystemgroup.com/file_media/file_image/file/97993900466.pdf
    • http://cropscipublisher.com/files/upfiles/file/37257283141.pdf
    • http://jimmartinfamilyreunion.com/clients/35696/File/wujajozagikobavuwot.pdf
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/f7r27htalpf3esbhbg4om2rmmq/25258339050.pdf
    • http://creativeindustries.ru/uploads/userfiles/file/vefelapula.pdf
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087f5d97a745---20443112483.pdf
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a193f93bdb4---35822943379.pdf
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/1607b91db44a3d---32430955110.pdf
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c98189d5d0---nawav.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c35vlhllr941rrq7o3o3i2jke4/72191522613.pdf
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606da18de7533---darowepot.pdf
    • http://wib24-admin.de/uploads/file/6431749227.pdf
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609441db9451c---melemotubaxiwep.pdf
    • http://laihoawedding.com/app/webroot/upload/files/82124264875.pdf
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160814bbeac391---puropofa.pdf
    • https://www.changhuapmo.org/plugin/ce1/ckfinder/userfiles/files/37183337349.pdf
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/76469a36df9e7599f700677f42f8f4cd/gukaniboj.pdf
    • http://amctop.com/board_data/editor_img/file/202106140829.pdf
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d7347178b5a---39852477412.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=thomas+calculus+early+transcendentals+12th+edition+solutions+pdf
    • http://irodori.kir.jp/files/file/gudejogiderinokovafufinaw.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_off0000d098.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD098 16792 bytes
font_01_sfnt_off0000e8aa.bin
e86db5b977e1e97907061be9fa6bce91b28c8fe9a7e96332ecd66158b375d88d
pdf-font-stream PDF embedded font (sfnt) at offset 0xE8AA 17084 bytes
font_02_sfnt_off00011587.bin
c8b1215546adae413bdc1e646ae3a36e4bb65a7c95e2a011ad3045450abc2928
pdf-font-stream PDF embedded font (sfnt) at offset 0x11587 11236 bytes