Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e0b8033064ae65a…

MALICIOUS

PDF

74.8 KB Created: 2021-09-01 00:06:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 86d463ffdc9ffc3098936ace1128f17b SHA-1: a8101074161b4b4dea16b0174e01f5141976565d SHA-256: 4e0b8033064ae65adf8c0ba4d8341a4088204e2496e7628ce3bc74e13c54f269
156 Risk Score

Malware Insights

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

The PDF file was detected 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 various websites, including those hosted on compromised CMS platforms. This suggests an attempt to lure users to potentially malicious sites for phishing or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • 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.
  • 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://aksukartela.com/images_upload/files/58552789210.pdf In PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1610484e9a37a6---zagapisabudatawetimuguw.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/6098b5b36d8cef078b2e57a611f1cd2e/sadapifaziser.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/1612e95e3154dc---jonopijuf.pdfIn PDF document text
    • http://happy-travel089.com/CKEdit/upload/files/sajataputevusukiramesu.pdfIn PDF document text
    • http://cheapneasytrafficschool.com/CheapNEasyTrafficSchool/pa/trainstation/uploads/image/file/zibatatomoxanimasuwalof.pdfIn PDF document text
    • http://www.gesas.it/media/mailinglist/file/kalalafoz.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/f8ce57d1ccc2cdd30170085edaa7cf26/92784623170.pdfIn PDF document text
    • http://goldnumber.info/userfiles/file/jebuwopizokorosi.pdfIn PDF document text
    • http://contelex.it/userfiles/files/koxagebowal.pdfIn PDF document text
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/2f3bd0d118b37b3f2bf3e0618c26aed1/82419222435.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/qp23e3nsvn4nanvuuj1pjjt4ua/47643861455.pdfIn PDF document text
    • http://salt17.com/userfiles/files/pifinubezuvisapez.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/weregavemiligapububawi.pdfIn PDF document text
    • https://cowichanseniors.ca/userfiles/file/kubibijofudesomo.pdfIn PDF document text
    • http://harasim.cz/uploaded/files/56172330702.pdfIn PDF document text
    • https://yocarbroker.com/upload/ckfinder/files/29021442680.pdfIn PDF document text
    • http://anatolianlgs.com/userfiles/file/94125585407.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160c122de49f0d---vevadud.pdfIn PDF document text
    • http://sbriz.ru/userfiles/file/dinokudunifojogusebudig.pdfIn PDF document text
    • http://myucmas.com/userfiles/file/fomotamalezokifanupizote.pdfIn PDF document text
    • http://alaskacounseling.org/clients/8/87/870ae3779d21e956d596131c1dd113ff/File/rubabideneroduzazuxumet.pdfIn PDF document text
    • http://kocavietnam.com/upload/files/92869753400.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=adl+activities+for+autismPDF 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_off0000c0c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0C3 10680 bytes
SHA-256: c8978ac3def593201e46a5788d07e1125dfb185eecc70d5410475000fce1c6ae
font_01_sfnt_off0000d953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD953 17320 bytes
SHA-256: 71649797f0601a02147fdb79c43f37214ea5bf184c594f93a2b0ddcec55a090e
font_02_sfnt_off00010624.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10624 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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