Malicious PDF — malware analysis report

Static analysis result for SHA-256 4adf01ee24e91166…

MALICIOUS

PDF

91.4 KB Created: 2021-09-18 08:58:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ce9e26d28505d51ae7fc47dca0f29d75 SHA-1: 5d042f3c2448023c1aa057ec1e3ef93adc85a90d SHA-256: 4adf01ee24e911663e902640da297491de86f8a6e3532e7ff1ba12ee333942d9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of embedded JavaScript and numerous external URIs, many pointing to compromised CMS uploads or disposable hosting, suggests it functions as a link farm to distribute further malicious content or phishing pages. The primary attack pattern involves luring users to these external sites, likely for credential harvesting or to trigger further exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • 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 https://catamma.ru/uplcv?utm_term=controlar+pc+con+movil+android PDF link annotation
    • https://kaktutzhit.by/uploads/files/89060450215.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/d7b90975af4eaa0e232099da046f021c/rebevukudik.pdfIn PDF document text
    • http://taxiluzern.ch/khurasan/userfiles/files/puwinixepituvaxesiregi.pdfIn PDF document text
    • http://lammermoor.net/imagenes/file/fuwari.pdfIn PDF document text
    • https://verlauf-ekb.ru/admin/ckfinder/userfiles/files/20559544228.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136ef1846561---26217681192.pdfIn PDF document text
    • https://www.allduniv.ac.in/ckfinder/userfiles/files/kasado.pdfIn PDF document text
    • http://studioscoponi.eu/userfiles/files/94065380177.pdfIn PDF document text
    • http://smeeing.com/userfiles/files/bopegavi.pdfIn PDF document text
    • http://alcantara.cz/data/file/jepiraneperi.pdfIn PDF document text
    • http://astprom.ru/sites/default/files/file/gotorerikisakeruvib.pdfIn PDF document text
    • http://tbeaindia.com/userfiles/file/79361699289.pdfIn PDF document text
    • https://pastelbuilders.com/userfiles/file/60050106923.pdfIn PDF document text
    • https://beldaoyun.com/calisma2/files/uploads/26967264600.pdfIn PDF document text
    • http://caphegiabao.com/upload/fck/file/gopetopa.pdfIn PDF document text
    • http://toyotaprius-custom.com/js/upload/files/74037180151.pdfIn PDF document text
    • http://canadianartistic.com/userfiles/file/90591668913.pdfIn PDF document text
    • https://2-view.org/home/view/public_html/ckfinder/userfiles/files/26899284964.pdfIn PDF document text
    • http://stihoplet.by/upload/editor/files/kukonadosiluvinavidokewu.pdfIn PDF document text
    • http://clubselectionvoyages.com/images/file/55597660624.pdfIn PDF document text
    • http://xn----8sbaqfskngn1qi.xn--p1ai/userfiles/file/wifawoxetora.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e9b0b14ecb---26009995426.pdfIn PDF document text
    • http://leebyunghun.org/new/upload/board/files/jizoxunuroputovufok.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_off0000fa96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA96 20260 bytes
SHA-256: 076dc926af62d1719cc9657ce0dd4a645c37b2a322fe218f05e16dac8ab0fb3e
font_01_sfnt_off00012e63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E63 10472 bytes
SHA-256: dc37ee2748726d93858724f3bd27733d729381ffa7dafdab0497ee25a7021d1c
font_02_sfnt_off0001462a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1462A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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