Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab5049408738f06c…

MALICIOUS

PDF

211.5 KB Created: 2021-10-05 14:18:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: e6fece459a0a8189e794210cd132c3e0 SHA-1: 1c4c73ec5dc2cd8e80aa2ce5e603017fc78fb5d3 SHA-256: ab5049408738f06cf5890e452a87778c55ba21f52d57127a5a0cd943939da7cb
126 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. It contains numerous embedded URLs, with one pointing to a compromised WordPress upload directory, suggesting it's used for phishing or distributing further malware. The presence of external URI links further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9509

Heuristics 5

  • 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.
  • 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://ketchas.ru/uplcv?utm_term=luther+and+melanchthon PDF link annotation
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146d3a2d79a7---rikuzuxaranigo.pdfIn PDF document text
    • http://inspeq.eu/public/files/625962648.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161310e21a1833---4696100772.pdfIn PDF document text
    • http://msslink.ru/userfiles/files/26265331194.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1613310bf7c120---68479737178.pdfIn PDF document text
    • http://laguna.piyawatgroup.com/images/files/58070979014.pdfIn PDF document text
    • http://clubselectionvoyages.net/images/file/tiwisigogifokosobofibo.pdfIn PDF document text
    • https://russiancosta.ru/ckfinder/userfiles/files/gepevewemowibokimez.pdfIn PDF document text
    • http://benedictinoselrosal.org/ckfinder/userfiles/files/rebopubokogelubitu.pdfIn PDF document text
    • https://bhiringisamsankalimandir.org/userfiles/file/79422918808.pdfIn PDF document text
    • http://rvhifi.cz/files/file/pifowoxutavoreliw.pdfIn PDF document text
    • http://lexprikson.com/admin/style/images/userfiles/file/40024956656.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b7a11b1d86---sufizerawiwizovitivavize.pdfIn PDF document text
    • http://alwaditrading.com/userfiles/files/79704918497.pdfIn PDF document text
    • http://xn----dtbhwhggdaoqfh3d.xn--p1ai/media/file/jasimizowafojez.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614cda0eddbec---51837903247.pdfIn PDF document text
    • https://datajournonepal.org/files/jirifepiwik.pdfIn PDF document text
    • http://tutek.eu/userfiles/file/82483900431.pdfIn PDF document text
    • http://intimatehotelpattaya.com/image/upload/File/94627824416.pdfIn PDF document text
    • https://adikkeempat.com/contents/files/57225634626.pdfIn PDF document text
    • https://aptitudeclass.com/ckfinder/userfiles/files/13743986066.pdfIn PDF document text
    • http://cermak-expo.cz/data/files/file/9179033894.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16153eb947e088---bufetesunijitenamijokef.pdfIn PDF document text
    • http://khachsandomino.com/hinhanh_fckeditor/file/tulukovekusodi.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16156bdad78548---3380961596.pdfIn PDF document text
    • https://fullmagicweekend.com/ckfinder/userfiles/files/xodemeniligen.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002b6df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B6DF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0002cef1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CEF1 25000 bytes
SHA-256: 95b1888cdc192a5616ab1c2af5188fa6d65142664462843f7800b8a48337e5d8
font_02_sfnt_off00030e59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30E59 16684 bytes
SHA-256: 5786d7639d2cc1522a1a3889fae5b5c9fbcbd5f5c9de2f5a2930a0e54327038d
font_03_sfnt_off000325f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x325F7 10432 bytes
SHA-256: 43b9b18a815815a3b5df035048298a423e7a50a570fbffc3a5c63596535d95c9