Malicious PDF — malware analysis report

Static analysis result for SHA-256 d29e631eba633df9…

MALICIOUS

PDF

82.6 KB Created: 2021-06-12 03:59:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: b966f1b73eed91943a73cde31f55db51 SHA-1: 27a6d96acdc91eff8f2ac7d8bc3d537cb80ba3f2 SHA-256: d29e631eba633df9c18ed69ccb5ed6ea7a02f6d797b44f649d19983f19d3bc91
156 Risk Score

Malware Insights

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

The PDF file contains numerous links pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting. The primary URL suggests a lure for 'icloud unlock deluxe free download for pc', indicating a phishing or potentially unwanted software distribution scheme. The ML classifier and ClamAV detection strongly support the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://allytemp.ru/uplcv?utm_term=icloud+unlock+deluxe+free+download+for+pc PDF link annotation
    • http://talani.nl/userfiles/image/file/wapiwakedasamemogidufo.pdfIn PDF document text
    • http://erdivigado.hu/userkepek/file/15893795458.pdfIn PDF document text
    • http://wagnerpc.com/userfiles/files/22042460834.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/zipifiwiwitewobadi.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/5viadmifh592l7it9joepgtvpf/10794835285.pdfIn PDF document text
    • https://aedwea.com/upload/foto/sijogozax.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/56269648601.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ec535626f---44992988756.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/4f771b263683092fe2d101ec5aed5585/weloviwazokiseromoz.pdfIn PDF document text
    • https://www.ideaklinikankara.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081bc08a9aa4---65096920789.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c3ed0871234---fofebasavenoku.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160921d3c66751---totikabaju.pdfIn PDF document text
    • http://xn--12cm8caae5d9a0a0a1dxk6dd.com/user_img/files/pavijobafuruligamipi.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16082c74f8f334---vusagunig.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a1feaba1ba4---3163065555.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn 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_off0000ef59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF59 5132 bytes
SHA-256: 03b2d9a1042d606725458b1166c55f8497a507679d2ac3620d02e1947ed1d04c
font_01_sfnt_off000100f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F4 11428 bytes
SHA-256: dc4ade2a38e8ee7699c884d5b2c543ae17fac89051ea6b70fd799e8a2e5e831d
font_02_sfnt_off000127f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127F3 16076 bytes
SHA-256: 12198ed304d8e74df64bcaa8a4aae6da6436d73ceeb6d758e01031f89a18fcfe