Malicious PDF — malware analysis report

Static analysis result for SHA-256 270a081fa9b2eb30…

MALICIOUS

PDF

86.9 KB Created: 2021-08-11 05:14:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3442f4e2935ce1caf821fc4cd1f3ff5b SHA-1: f383a5b0b9b35b40e3cf8e4ecafdb5600a524e1e SHA-256: 270a081fa9b2eb3062768573ce828016cbe29feb770c490bc42cff36a91f6a4a
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous embedded URLs pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://smidgel.ru/uplcv?utm_term=does+mercedes+c300+have+apple+carplay PDF link annotation
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091f5dcedea1---tusabetidezeduwul.pdfIn PDF document text
    • http://beiwendq.com//data/attachment/file/dorugidoboxigumep.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160711198c9ac5---12339418830.pdfIn PDF document text
    • https://alixdemassy.fr/userfiles/file/virezulodixorotijazosa.pdfIn PDF document text
    • http://chataphan.com/file_media/file_image/file/70055144756.pdfIn PDF document text
    • http://therealmccoyfamilyreunion.com/clients/f/f9/f9ea119420dddc0cc5ac7622830b9f68/File/kopinewimeme.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160cbebcc60c19---sapifurepifuxavawopajix.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160842843da67a---nikoxadevororixotojisoka.pdfIn PDF document text
    • http://kamerton.nl/clientfiles/rawemera.pdfIn PDF document text
    • http://brooklinehs1964.com/clients/6/6a/6a3559cec3eb17f551da2d864c8c85ab/File/14426211074.pdfIn PDF document text
    • http://salkim.com/userfiles/file/xupadopazelorazoka.pdfIn PDF document text
    • http://ozdoby-betonowe21.pl/Upload/file/wivolevonokir.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160dc17e0ba360---rasazebafiz.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/1ii7hdnfs7gc66u6gjultcepf0/pasopetizaduxiwo.pdfIn PDF document text
    • https://arvikabc.com/images/uploadedimages/file/futozuvesonizomaz.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9d1dac899---3786869578.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/t35s89jb60jhbpmq2j03k4om03/wifutusomesazefedo.pdfIn PDF document text
    • http://bookblog.kr/data/file//files/jebiwijila.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/0b513e56adee2045f0b2a8d1708b6263/42020149745.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/ae5d2faa769d490f2eed7a6d5e832bf3/jamelaxikitedizoxusugi.pdfIn PDF document text
    • http://dichvugiayphep.net/hinhanh_fckeditor/file/sifepive.pdfIn PDF document text
    • http://hjtech.org/admin/upfile/file/watetuguxekonujewu.pdfIn PDF document text
    • http://etcad.net/np/upfile/file/21721366037.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_off0000ef72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF72 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010784.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10784 17200 bytes
SHA-256: a6b96033ec19f20d699d923c56dccccf904c30612443e8c04418984c423de88e
font_02_sfnt_off00013449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13449 10960 bytes
SHA-256: 6c06004c8839246c5f5f8112321209081889be6a760f289b5ca7e4a67f904a12

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