Malicious PDF — malware analysis report

Static analysis result for SHA-256 56c820e5778e5dba…

MALICIOUS

PDF

78.7 KB Created: 2021-09-11 20:25:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6630e152b0ee17965a4d8ec71688e1f5 SHA-1: 6d27ac183bee2e801f0682575e740e78454e3068 SHA-256: 56c820e5778e5dbab971f9a5a5b51c472a18dc7e0e302ec875c8071654c1abad
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external URLs, some hosted on compromised CMS uploads or disposable domains. The embedded URLs, such as 'https://oniceh.ru/uplcv?utm_term=alien+shooter+hack+iphone', suggest a lure related to gaming or hacking, likely intended to trick users into visiting malicious sites for phishing or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://oniceh.ru/uplcv?utm_term=alien+shooter+hack+iphone PDF link annotation
    • https://aawyx.com/sites/default/imageuser/file/52668407649.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c566f0df57---75876872051.pdfIn PDF document text
    • https://vico-immobilien.com/ckfinder/userfiles/files/34311028456.pdfIn PDF document text
    • http://k-sta.kr/FileData/ckfinder/files/20210906_CA7658F5FCFD4962.pdfIn PDF document text
    • https://trickapotisk.cz/webpagebuilder/ckfinder/userfiles/files/sikenolowi.pdfIn PDF document text
    • http://www.galiantsolutions.com/emailimages/file/56823795198.pdfIn PDF document text
    • http://ottotech.center/userfiles/file/zumelinodil.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/2e500fba2bb74224c32d7eebbee5676c/63232933685.pdfIn PDF document text
    • http://tsrmmessina.it/userfiles/files/gojunila.pdfIn PDF document text
    • http://www.egavilanes.com/ckfinder/userfiles/files/vanufuf.pdfIn PDF document text
    • http://bc-arman.kz/ckfinder/userfiles/files/xemujolopatevinatikerut.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/bc1144d5e0d2cb70bfe837f18389371d/vewetu.pdfIn PDF document text
    • http://fd-health.com/upload/ckeditor/files/bewesaredule.pdfIn PDF document text
    • https://hainutedecopii.eu/ckfinder/userfiles/files/ruvud.pdfIn PDF document text
    • https://hantverkarenisandby.se/UserFiles/files/35830772462.pdfIn PDF document text
    • https://toananhmedical.com/uploads/files/lumasojedupabagakomatuwiz.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/kajujur.pdfIn PDF document text
    • http://studioriboldi.eu/userfiles/files/15977210017.pdfIn PDF document text
    • http://przystaneknida.pl/data/aktualnosci_imgs/file/gikinupotepupelokisogu.pdfIn PDF document text
    • http://ballmillfactory.com/d/files/34150219079.pdfIn PDF document text
    • http://ilyxrace.com/userfiles/files/jepenelokapuboxerulizegov.pdfIn PDF document text
    • https://www.borzabadi.com/ckfinder/userfiles/files/45459515348.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16139423b50ecb---fofokixo.pdfIn PDF document text
    • 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_off0000ce09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE09 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e61b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE61B 18004 bytes
SHA-256: 349b26f7b66ef1587e5b7a0ea4b2f386e282b7205eae532bc83a78aedae2efe1
font_02_sfnt_off00011440.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11440 10544 bytes
SHA-256: 86c5e9053071800a9a2a2ebc8394bfb518af7c2a9659ba60cf980f5569a70549

Open this report in the interactive analyzer, or submit your own file for analysis.