Malicious PDF — malware analysis report

Static analysis result for SHA-256 06a1854150adfb8d…

MALICIOUS

PDF

96.0 KB Created: 2021-07-23 05:49:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 07f3a78d314752ddd8abde546b1ed7e3 SHA-1: 6acad81f310ec424c557b289614b3dae62ab5cec SHA-256: 06a1854150adfb8d011a6745daba2aeea82cb71b2646fdf649858c31f8f1415f
164 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 heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress upload storage locations. The presence of a 'download button' lure further supports a phishing or social engineering attack pattern. No scripts were extracted, but the overall structure suggests a phishing attempt to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/b3abbeb9eb399122bbf5a675a0af05df/67646146283.pdf In PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f00e35de31---zowomifipiwapo.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081f9cb36642---tinururutuxamux.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/ekccif40jotpdvjnjne1egqmfr/fosedufoxa.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/9d1n0te4nvk6vk0tnb4f317b63/kiwutabijufazivodukifefaz.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/bd433738558364fe28d7e3107adf8cfb/56760775192.pdfIn PDF document text
    • http://greenplanetnepal.com/userfiles/file/54238756019.pdfIn PDF document text
    • http://jncs.kr/page_data/file/20210521213054.pdfIn PDF document text
    • https://burlingame.com/wysiwygfiles/file/80225160997.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/h06vclhkmm1hb6sdq4drmm8gr6/lijofawibinajuki.pdfIn PDF document text
    • https://chp-travel.ir/data/file/wofepovojowilawiweruvotut.pdfIn PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/9846c607cef6fcf89dc489efbb5a76a8/bilabivinike.pdfIn PDF document text
    • http://lucchetta.net/userfiles/files/64582761810.pdfIn PDF document text
    • https://diarch.in/WYSIWYGImage/file/12870334750.pdfIn PDF document text
    • http://hesexpo.com/img/editor/image/file/33593608553.pdfIn PDF document text
    • https://f27szerviz.hu/upload/files/18323978095.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/3c1765860490bb0ecea0ce48cfc0963a/dodurilufamijorisodene.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/8ee10de6adb2ac2eaa7b71c9959bd410/3656719063.pdfIn PDF document text
    • http://bearings-home.com/userfiles/file/12412037787.pdfIn PDF document text
    • https://icon-studios.com/userfiles/file/14489881593.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb24b00b8b---fozanupamelenuja.pdfIn PDF document text
    • https://angelsstaff.com/uploads/file/83462443287.pdfIn PDF document text
    • http://domholidays.com/userfiles/file/43698272867.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b25f1bc5bd8---78019487256.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=led+viva+questions+with+answersPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC27 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011439.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11439 17972 bytes
SHA-256: 87bd9a77ffcbcc4c0cdcfc30ab6807a00967c5c1db0bdfd85b6fb528e01f510a
font_02_sfnt_off0001438e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1438E 10652 bytes
SHA-256: cc9d8baf7d70af9e89bd73d25e9b6cd92d88bb772fd8df739c003c939275b810
font_03_sfnt_off00015bbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BBD 16208 bytes
SHA-256: 985d77897fa4ac72e22eb40092350881c22d33eb2af824db24228573733b1c75

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