Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d46cae4fdaecdc4…

MALICIOUS

PDF

79.6 KB Created: 2021-09-01 12:07:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 57ffdc2719e0a1201b869ecfbdcee9b2 SHA-1: e5c2b789e4276e29eb5b227e672f763f509f180b SHA-256: 6d46cae4fdaecdc42a356fa348c8363d217975513bd3192dc8de7613682786c5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to potentially compromised WordPress upload storage and other disposable hosting. The primary purpose appears to be directing users to external, untrusted resources, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://414movement.com/wp-content/plugins/super-forms/uploads/php/files/e81092361444d8d81a61414ec395840e/56322603902.pdf In PDF document text
    • https://giltmorestukko.hu/ckfinder/userfiles/files/86322635717.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac92b2cab2---54808413845.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/snf5f0sun24est0298vsigkii1/7894430549.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/cc1eff4007d15cdc70cd11e32ed5eddc/tivusigegupome.pdfIn PDF document text
    • https://weilaimachinery.com/userfiles/files/polojowumil.pdfIn PDF document text
    • https://tekmaker.com/upload/files/bijumaxa.pdfIn PDF document text
    • http://voszveszprem.hu/_user/file/25593509571.pdfIn PDF document text
    • http://srihemkuntschoolint.com/slbdavbatala/userfiles/file/20725760319.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/g31dfccan02qilojh7jp449lga/nabeluwotino.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ad14c3699cf---mugiseno.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/a1a44f0b0c88ae5bd0466fae3b8bb29b/42320849569.pdfIn PDF document text
    • http://marketingnews.fr/images/file/gifavugevuk.pdfIn PDF document text
    • http://thefjordbaklawfirm.com/clients/876731/File/26592029922.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/121cf2a23a3eecf0addb8537e2197830/8855606552.pdfIn PDF document text
    • http://zulassung4you.de/bilder/file/15382370344.pdfIn PDF document text
    • http://kimhoatra.com/upload/fckimagesfile/14219601733.pdfIn PDF document text
    • http://flirtproducties.nl/ckfinder/userfiles/files/karazibinixonerapib.pdfIn PDF document text
    • https://ihappywash.com/uploads/files/202108221541479723.pdfIn PDF document text
    • http://93564497.com/userfiles/12136969660.pdfIn PDF document text
    • https://szud94.hu/img/sajatfile/files/babexirefuwulenaponuse.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=wonder+woman+naked+cosplayPDF 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_off0000cd64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD64 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e576.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE576 18476 bytes
SHA-256: 74b2d7cf5634fc8652c4c68e5ab85446eb03b8c056bb68a674329cec7c64415d
font_02_sfnt_off000115a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115A6 10768 bytes
SHA-256: 2f9e9d0c512ea1d6bde9896a1e1ce87ce7dadfe6a1fd0fff100c2b6ea9c49858

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