Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eba7a84886d5670…

MALICIOUS

PDF

86.6 KB Created: 2021-07-31 00:45:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ab1c629c278a0865a836f6e0059ca86f SHA-1: 669ec9beb81da9a4fa73bda0f414238b92b6392a SHA-256: 6eba7a84886d56705180357b7fb06ea1a420af0c69ad73013d24f042c356423a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links, many of which point to compromised WordPress upload storage or are hosted on disposable domains, indicating a link farm designed to distribute malicious content or engage in SEO manipulation. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://reicar.dk/userfiles/file/16589882092.pdf In PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084810f6e670---44024881250.pdfIn PDF document text
    • http://sbkf.org/files/files/57039016833.pdfIn PDF document text
    • https://pelicanfinancialnetwork.net/ckfinder/userfiles/files/dupemikepasimukosowigedad.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/k5k3cfr761i2ap9mh1cvbgjg02/21494691599.pdfIn PDF document text
    • https://sunnyvale.com/wysiwygfiles/file/vowefawamul.pdfIn PDF document text
    • http://guides2alpes.org/uploads/file/jofoxumesoxoxikum.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/29ec52e176296aec33ae055224cdf35a/99465471207.pdfIn PDF document text
    • http://georgeandmaryjones.com/clients/f/ff/ff66b05efb8f16ea353d8e6908bb1429/File/pedemabugoma.pdfIn PDF document text
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160785167e0ef0---bafedepatedoxobi.pdfIn PDF document text
    • http://ferramentabelleggia.it/public/file/jiredoriturekewomonibib.pdfIn PDF document text
    • https://stpeterscbs.ca/ckfinder/userfiles/files/95754149593.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8134e4f60---nosogisexabipogazew.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096c948d4457---vetipuvemi.pdfIn PDF document text
    • http://jevades.com/aircraft/fckimages/file/16596611609.pdfIn PDF document text
    • http://baodieptailor.com/uploads/2021-07-29/images/files/62232851395.pdfIn PDF document text
    • http://ty-universe.com/image/files/20210601_035841.pdfIn PDF document text
    • http://beloezoloto.ru/userfiles/file/71255970735.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/ee98ea1058f0dc292459fce2de7d4aa7/ninazu.pdfIn PDF document text
    • https://semineebrasov.ro/printuri-fi/files/mojeja.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16079d1b76d0ff---lanogimanobawebujedaza.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609405e7140b4---67211434098.pdfIn PDF document text
    • http://www.ks-klinika.ru/ckfinder/userfiles/files/2799900929.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b5bb64a7ea---lajumori.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160788c16e677c---faxadubiwetavudezigetiweb.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=mixcraft+8+free+download+32+bitPDF 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_off0000eb58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB58 17384 bytes
SHA-256: 79390423fee6daa7bab3b70c34133c48de0904072625eb418654a948ff5d0ef9
font_01_sfnt_off0001190a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1190A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13121 11124 bytes
SHA-256: a62e34dc19d4cd65e3bd7a4a1eac429f18e513d18cc9a40b9f22977b4ae7ffd5