Malicious PDF — malware analysis report

Static analysis result for SHA-256 96f32fc1baf01587…

MALICIOUS

PDF

85.1 KB Created: 2021-07-23 13:55:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 9b75316428e863d1efe0152b827e14e2 SHA-1: 0353c7e336e58dc5dc4b8ac50710b80891754435 SHA-256: 96f32fc1baf01587b1dc963e3d46d7b4a32ca1c94e7b5bef5086a7f8b8c7223e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised WordPress uploads and other disposable hosting. These links are likely intended to redirect users to phishing sites or download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/e5c21d4e2604c5c36db415e846a16aa6/dulafu.pdf In PDF document text
    • http://gardatrans.com/content/Files/58441937546.pdfIn PDF document text
    • http://mesterek.net/tmp/69041230263.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/7fdvuoen6fjggo5oiumvhbeb88/pisigexobibimadowuwov.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160877478bd1cf---67199145622.pdfIn PDF document text
    • http://bowenlawmt.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nosanidusawinij.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///sajesonumi.pdfIn PDF document text
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/h11c3ut19q4bksbshorlkucid7/33164930115.pdfIn PDF document text
    • http://birzebbugastpetersfc.com/files/file/werakusawepalotaxotoke.pdfIn PDF document text
    • https://yingzhaoliuart.com/upload/file/6828408921.pdfIn PDF document text
    • http://liubeauty.com/luutru/files/37178062878.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/kvpr7rh88rbrksi6d4fdjv0o89/vivexokovofevama.pdfIn PDF document text
    • http://zonweringbelgie.com/ckfinder/userfiles/files/depaviji.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609b623dbf16e---kulim.pdfIn PDF document text
    • http://awkontrakt.pl/ckfinder/userfiles/files/piforogoxikagaxikuse.pdfIn PDF document text
    • http://eortak.com/img/fck_temp/file/pamuxikubaredafik.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e9451d3b74---7900703620.pdfIn PDF document text
    • http://iccjsc.com/images/uploads/files/tuvobisegewak.pdfIn PDF document text
    • https://indiantalentjunction.com/milan/media/tazoxukivifuvilululavemin.pdfIn PDF document text
    • http://caphegiabao.com/upload/fck/file/175257087.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/3900346d830b1e2309a3d805d5ebd882/12797194926.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/jot1g48bret6ffh49me7qklb30/fivifivugesutupetotekofo.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160b1a67e49717---82848335512.pdfIn PDF document text
    • https://www.ideaklinikankara.com/wp-content/plugins/formcraft/file-upload/server/content/files/160701995c698c---28326678646.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=bulk+density+of+fine+aggregate+test+procedurePDF 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_off0000e780.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE780 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ff92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF92 17024 bytes
SHA-256: ec1869fcba0e717619070a1f0fc4afd980f886c46b00268ea4b7622504dd16ca
font_02_sfnt_off00012c1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C1B 11156 bytes
SHA-256: 75621416d87dddcb46e8352c12d42348e0a58685b47d70eade6f50f8e916c9da

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