Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d1517578dc25875…

MALICIOUS

PDF

88.6 KB Created: 2021-08-17 03:14:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 12e79efec7a3c9cd88243bfa86582bf3 SHA-1: b548ce15fa295f14711dadd4b8bf1645bcee9db5 SHA-256: 7d1517578dc25875e1f33dee204b68576b0ee90c1842fee80127b695da9928f1
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs pointing to compromised websites and disposable hosting, suggesting it functions as a link farm for phishing or malware distribution. The 'SE_CALLBACK_LURE' heuristic further suggests a callback phishing or tech-support scam pretext, aiming to trick users into interacting with malicious links or potentially providing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://garglob.ru/uplcv?utm_term=how+to+take+apart+3m+worktunes PDF link annotation
    • http://escritacontabilidade.net/fotos/news/file/rubipulokefifisijam.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ebebbc65cc---81019280192.pdfIn PDF document text
    • http://paulsaperstein.com/userfiles/files/14595191532.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee70d243ef4---sotijubofamupazusiziga.pdfIn PDF document text
    • http://travelport.pl/userfiles//file/37584869778.pdfIn PDF document text
    • https://bloomland.com/sites/bloomland.com/files/49826197121.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610e262827842---tujuguzi.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160810698609b4---getenoluladunaduxozila.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094129781de9---79896105827.pdfIn PDF document text
    • https://gamasteel.net/userfiles/file/84316784797.pdfIn PDF document text
    • https://preprodpcb.com/userfiles/files/75730257484.pdfIn PDF document text
    • https://energooptima.hu/upload/File/rupojefoxam.pdfIn PDF document text
    • https://louvre.lv/res/wysiwyg/file/karav.pdfIn PDF document text
    • https://albizy.com/ckfinder/userfiles/files/werukosidato.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/16102a2016e486---27389774936.pdfIn PDF document text
    • http://www.polni.si/Images/files/xilatifalifaguzufitefa.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a342d79ea2c---mobagid.pdfIn PDF document text
    • https://mmszke.hu/files/file/fujopuboraxe.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a404506e85a---xirawewiribima.pdfIn PDF document text
    • https://brothers-music.com/ckfinder/userfiles/files/katemabopixo.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/300de8359433e91bf7a3ecacd04e2a22/28638855782.pdfIn PDF document text
    • https://zabulgaria.org/userfiles/file/45646909126.pdfIn PDF document text
    • https://savitravel.ro/ckfinder/userfiles/files/lanepatabado.pdfIn PDF document text
    • http://rayer.cn/d/files/75695487912.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_off0000f1a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000109b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109B5 18980 bytes
SHA-256: 27e337ca44aec01bf54d0ebf96d557f1358bd3c64f3fd7f5abb8432332d55807
font_02_sfnt_off00013c3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C3A 10716 bytes
SHA-256: 2eed7f7b16f67545960b65bc782bda5e3349cad0b1f0c743d2cd1200140d5772

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