Malicious PDF — malware analysis report

Static analysis result for SHA-256 384f930ded0a7ed8…

MALICIOUS

PDF

72.0 KB Created: 2021-09-25 11:38:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 56038a4db2fe740a94e27b16ea820173 SHA-1: c789d464c9426c468befa66ac9a4efd9221fc898 SHA-256: 384f930ded0a7ed8092a96bbd62dc76abb79698c9c72b50d6cafb9416e7eeb3e
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to deliver second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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=queen+and+slim+123movies+free PDF link annotation
    • https://holocaustresearch.pl/nowy/photo/file/45788305187.pdfIn PDF document text
    • https://acrgruppe.de/userfiles/file/49841979259.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1614e3c6d89347---47715623058.pdfIn PDF document text
    • http://imaginove.eu/data/Files/bilurumonubafepunuvekow.pdfIn PDF document text
    • http://farmaciafasolis.eu/userfiles/files/wepipoge.pdfIn PDF document text
    • http://millionsdiscount.com/mo_images/files/tiwopuxotinuxebo.pdfIn PDF document text
    • http://chothuexehochiminh.com/userfiles/file/33753867093.pdfIn PDF document text
    • http://divodizain.ru/ckfinder/userfiles/files/livoselawowaxi.pdfIn PDF document text
    • http://inphilong.com/upload/files/57450256581.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/05662decb6aebab98d7f86b313a947a1/63980252913.pdfIn PDF document text
    • http://haithuanphat.com/uploads/files/1242071804.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/161317ae723a19---7231771323.pdfIn PDF document text
    • https://phukienbep.net/media/files/puwanezilapodukel.pdfIn PDF document text
    • http://panel2conso.com/userfiles/file/94500693339.pdfIn PDF document text
    • http://cnpair.com/userfiles/file/sawejazexu.pdfIn PDF document text
    • https://www.karelo.com/uploads/File/wojibezuzuli.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1613ddfdf91696---busulalawotaruzakari.pdfIn PDF document text
    • http://bora.su/ckfinder/userfiles/files/zigupusedatetuzaxivugaxi.pdfIn PDF document text
    • http://jjw-led.com/userfiles/file/95114446367.pdfIn PDF document text
    • https://vinamex.info/uploads/news_file/fufesukapuxuliv.pdfIn PDF document text
    • https://okazionche.com/files/bikakobepokijaxitolifugom.pdfIn PDF document text
    • http://eternalcycle.com/FCKFiles/file/paxukuripawatase.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_off0000b18c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB18C 17616 bytes
SHA-256: 08fd1479330861a65c447f1731261a3d8ce7a6174361087c5f70af22efbd932f
font_01_sfnt_off0000deca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDECA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f6e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E1 10984 bytes
SHA-256: 6fd4d4a707154bdfbd78c6c70f239bf7e42b952c01106f0a16e3e97273e5c3de

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