Malicious PDF — malware analysis report

Static analysis result for SHA-256 055f6eb11e40a252…

MALICIOUS

PDF

88.6 KB Created: 2021-07-01 12:08:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 1f183a5c05b8877d74d581a26387937c SHA-1: e95d3f5f306d9a3d56eb3fd6450defabb7a99712 SHA-256: 055f6eb11e40a25207b1b4dbaf02047c03cdb57ec4ea3a515a9cd493346368ee
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and numerous links pointing to compromised websites, suggesting it's used to distribute malware or conduct phishing. The heuristics indicate a link farm hosted on disposable or compromised domains, likely serving as a lure to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 https://absolut-fit-and-dance.de/wp-content/plugins/super-forms/uploads/php/files/kic19lpbhqjdhlls415at56008/bagolovidimil.pdf In PDF document text
    • http://interface-referencement.com/userfiles/file/nidujuluzejuzezojamukigut.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/0bc079fa511e4ac3c5fd096ad1bd1b66/12951498860.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/me255rgmp0mis80lrvkvkldr7g/82817272530.pdfIn PDF document text
    • http://bayernglobal.de/userVZ//file/72861323501.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce7827a060---lorijujikep.pdfIn PDF document text
    • http://kapelski.pl/userfiles/file/59076443893.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/cqv3jsep1n44l6754c59ot0v06/71864383701.pdfIn PDF document text
    • http://hzzxtl.com/UploadFile/file/20210623105407553.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/2im1c5ng5ks4glmo1cprqthodn/80500436089.pdfIn PDF document text
    • http://xn----8sbfeahwarn6ac1adp3fb2p.xn--p1ai/userfiles/file/66010358555.pdfIn PDF document text
    • https://capital-tic.com/upload/ckfinder_temp/files/20210619124306.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/24bf57b59b4f3a0e401b6730da4872b1/22186059846.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c459221072---biluxexofuxakusatopomepen.pdfIn PDF document text
    • https://aucordechasse.fr/vosImages/15401870659.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/5db4uto64b0p9c4ggm0imvmi05/43080730834.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/43139841285.pdfIn PDF document text
    • https://asharfilalkulfi.com/ckfinder/userfiles/files/zezefolijikogemaxi.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160afa4f4df574---2180827203.pdfIn PDF document text
    • http://docando.es/js/ckfinder/userfiles/files/bufogozej.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/cf5aa31a2df21eb176a37ed2ed2a08d3/90051479790.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/b69bf8db6fed356a5511b0903d8a0c9e/nefenuguperaxel.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=what+are+the+basic+units+of+length+mass+and+volumePDF 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_off0000f3d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D3 17304 bytes
SHA-256: ae54be9a7a9ce3a10c81117cb22fe3cd984a5283620bd3e6f5436a122a30fb7d
font_01_sfnt_off00012118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12118 11220 bytes
SHA-256: e7ef7cd85d58e069c3d38f4f53c3cb7abbb7ca3371e7003671f6be6b460eb2b9
font_02_sfnt_off00013b07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B07 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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