Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbd08d28bc94e3da…

MALICIOUS

PDF

95.6 KB Created: 2021-09-03 23:49:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2fad05fc933620470ff58ba1584179c3 SHA-1: fbfb78f263f57897109a7dceaf33f3a85cc42f82 SHA-256: fbd08d28bc94e3da08546353f5d535802bbc5ace98d6df92d8433cf35c1bd015
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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://crewmak.ru/uplcv?utm_term=transmedia+storytelling+pdf PDF link annotation
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c6f434289ce---zetuzefepomaxiresinomamiv.pdfIn PDF document text
    • http://cathyknightwaite.com/ckfinder/userfiles/files/12354775461.pdfIn PDF document text
    • https://www.ergunaygoren.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071a2ad40b74---julukaxawevex.pdfIn PDF document text
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/469a70d11e0fc756a2d4702dc4f8c84a/36054489986.pdfIn PDF document text
    • http://marmaraisg.com/images_upload/files/fobomekeniz.pdfIn PDF document text
    • http://dkmmotor.com/files/userfiles/file/gigokigixu.pdfIn PDF document text
    • http://krzysztofmalec.pl/gfx/fck/file/8164141363.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e531623458---18109229096.pdfIn PDF document text
    • http://siblom.ru/files/upload/file/56825267900.pdfIn PDF document text
    • http://kurskodkb.ru/page_edit/_samples/userfiles/files/sevorisozotakogezipifadu.pdfIn PDF document text
    • https://autoroman-service.ro/imagini_ws/mofuwaxasejezimimekari.pdfIn PDF document text
    • https://betentour.com/sites/default/files/file/laxafazonukipur.pdfIn PDF document text
    • https://whiteelephant.co.in/wp-content/plugins/super-forms/uploads/php/files/4ce9e55d92330d50b970a221dfd477aa/55601142405.pdfIn PDF document text
    • https://penal-garazh.ru/files/sidujelubuk.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb48d0b4b3---40387930706.pdfIn PDF document text
    • http://liebherr-tr.com/userfiles/file/minobipike.pdfIn PDF document text
    • https://cakenepal.com/userfiles/file/dejatedotoworid.pdfIn PDF document text
    • https://sleepthai.com/piceditor/file/50943662536.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/i2tc0hbo7nn1c5csfsh866etc0/bopawut.pdfIn PDF document text
    • http://bburago.info/admin/fckeditor/userfiles/file/selurogixa.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/d83fe90816ea1c8c6e9b966958d7c499/20423974196.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/16082bf5595b6a---silakujifiru.pdfIn PDF document text
    • http://toyotarent.tw/FileData/ckfinder/files/20210802_CD6805EFD2187D5C.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_off00010e6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E6B 18944 bytes
SHA-256: 675c27b319639699989489fd0e2f8f7adff61a0141d16e10574186079405e23f
font_01_sfnt_off00013f85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F85 10920 bytes
SHA-256: 62f7b93e689d58d3f51d88db4068fb33511a968877bc239816efeb97e528b143
font_02_sfnt_off0001589e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1589E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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