Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d2ae0defd54a657…

MALICIOUS

PDF

83.3 KB Created: 2021-06-06 10:20:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 47fd80d4870e068ee8f74d7108aa944d SHA-1: 5bc11c2f4ea16fe57c3209404756de27d6894db8 SHA-256: 3d2ae0defd54a6579d2c8979defca14a55f518aaabec6141e3c78876e41ac3e3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains keywords related to printer issues, likely a lure to encourage users to click the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=hp+envy+won%2527t+print+alignment+page PDF link annotation
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/160a417ce48938---pefobujipotinoziw.pdfIn PDF document text
    • https://faresaldabbous.com/uploads/files/55438560163.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e1ead72043---wobeseneba.pdfIn PDF document text
    • https://grupo-bahia-real-estate.com/ckfinder/userfiles/files/faxig.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/5ctpnm2c25ge7enorskh7su2i3/teriretovogepigefu.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/32d1ecd8c469c9623f77df93d046c546/loxizuxab.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/16099b4bddb529---lulamokifagape.pdfIn PDF document text
    • https://arichaindia.com/userfiles/file/tapuxoj.pdfIn PDF document text
    • https://ceccarbotosani.ro/userfiles/file/79713935482.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/7m12ms5j14a7hd0j6o4bfb7lb6/62419694069.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/tojubobuvotogapozuri.pdfIn PDF document text
    • https://www.ndgai.com/wp-content/plugins/super-forms/uploads/php/files/j38ltppahldie5lfvqdjb9i00k/kutadogegumivob.pdfIn PDF document text
    • https://daleel.global/wp-content/plugins/super-forms/uploads/php/files/5jusc9l63alpvs8g0b7iiuito6/85088486855.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/nabaninaxirip.pdfIn PDF document text
    • http://mgocsm.in/userfiles/file/43037603788.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608945cda95e4---65527064070.pdfIn PDF document text
    • http://www.deopendeur.org/imgUser/file/31477324678.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/dc4c2816c09bf059fe1445b821005d4b/tumamot.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn 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_off0000ecab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECAB 5212 bytes
SHA-256: 2c5456d0fb9c04857a4d6c71844fdcddda8a43b00a3abc37474b07f68c1cd3f4
font_01_sfnt_off0000fe6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE6F 11176 bytes
SHA-256: 2d34be350ccd5ca7c40ccba8e0f06a76f5e2352c194520d98a7de5a9e7f9d021
font_02_sfnt_off0001245c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1245C 17680 bytes
SHA-256: e71c44bf5e22a934fc1669afbd5300a45ab4e303d5e4e0e2d40fc188d09b4b34

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