Malicious PDF — malware analysis report

Static analysis result for SHA-256 92bff5ea94db70f8…

MALICIOUS

PDF

94.7 KB Created: 2021-09-02 02:56:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 18b972bcb83ff571a3193c0009638c19 SHA-1: 974c03119f4689d1c060c5a0056978c1ba8fa415 SHA-256: 92bff5ea94db70f88cf07e963ddcc5dfd07ec4d85a568bf5c6e045bf5b15d2c3
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a link farm pointing to multiple disposable domains, indicating an attempt to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of embedded JavaScript (T1059.007) suggests it may be used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://londonjip.com/userData/board/file/famolamugedu.pdf In PDF document text
    • https://luxesystem.site/js/ckfinder/userfiles/files/96888299148.pdfIn PDF document text
    • http://gamjagolla.com/uploads/files/93474095537.pdfIn PDF document text
    • http://shreyaghoshal.com/konadnew/userfiles/file/zugujogipedamurimi.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/07b6004fa336794a9d205984cc325ea4/vazikasaf.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608112fc70359---22498330196.pdfIn PDF document text
    • http://obrienbuilders.com/userfiles/file/50656893724.pdfIn PDF document text
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/946b52bc76bc7001ccc18535281676c7/degamagalalukefiv.pdfIn PDF document text
    • https://ecohort.com/userfiles/files/tadetuwe.pdfIn PDF document text
    • http://bscartridge.com/pic/9650986186.pdfIn PDF document text
    • https://amursvoidom.ru/media/files/kumewewuwifotukarurawe.pdfIn PDF document text
    • http://xn--72c7caerxx0d3a9eve.com/UserFiles/File/85095901660.pdfIn PDF document text
    • http://tokyoto.pl/UserFiles/file/65843766299.pdfIn PDF document text
    • https://deesudcoolingtower.com/userfiles/file/rosifiparebewafovigaved.pdfIn PDF document text
    • http://bradleyhillsapartments.com/demo/uploads/contents/file/wezimejanodivaj.pdfIn PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/2vvqiom03lin45k6ivbpg10rp0/99552897.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb03e34edba---8073965613.pdfIn PDF document text
    • https://curewelldiabetes.com/userfiles/file/wotedodoliz.pdfIn PDF document text
    • https://whiteelephant.co.in/wp-content/plugins/super-forms/uploads/php/files/2d4ef6897bfcec66608fd4399a3e1e9f/99759187274.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160843742498cd---61816850519.pdfIn PDF document text
    • http://timebank.ru/sites/default/files/photos/pagefile/29706402947.pdfIn PDF document text
    • http://ceskylakros.cz/userfiles/file/73723254672.pdfIn PDF document text
    • http://babywagen24.de/userfiles/file/felelolevisaxefiwinija.pdfIn PDF document text
    • https://media-get.ru/userfiles/files/ruzidubumasonove.pdfIn PDF document text
    • https://hansenlight.com/UploadFile/files/57959119740.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=ps2+games+2006PDF 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_off00010e28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E28 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001263f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1263F 10300 bytes
SHA-256: efab540d335bb2e818749f7eb55e523e805afd5eb64234c7a62ebda2eb12960a
font_02_sfnt_off00013d92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D92 18376 bytes
SHA-256: 52c800d5f51ca29f5f8122594d120577c5d63275ed31a7d8946246aa44d2a131

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