Malicious PDF — malware analysis report

Static analysis result for SHA-256 e09b36f2ad901cfa…

MALICIOUS

PDF

79.5 KB Created: 2021-09-11 20:14:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: fc7001ee461d0c75a2af3641b2e1dc65 SHA-1: 5a77bc45ba90b6cda148c4e87e8ef259a9916ea5 SHA-256: e09b36f2ad901cfa0eb0dfa3e1ddff5cbf8506ed3185c76bbfa78860c05ccfbd
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised WordPress sites, indicating a link farm designed to distribute malicious content. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' strongly suggest this phishing or malware distribution attempt. The ML classifier and ClamAV detection further confirm the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://freewest.at/genelir.pdf In PDF document text
    • http://plaschke-partner.com/uploaded/file/94388945396.pdfIn PDF document text
    • https://futurefacesmiami.com/uploads/file/zoxasaxijalazagif.pdfIn PDF document text
    • https://garraldaarquitectura.com/garralda_userfiles/files/98026190930.pdfIn PDF document text
    • http://chinastom.ru/userfiles/file/31895884134.pdfIn PDF document text
    • http://theexplorerthai.com/userfiles/files/24751982630.pdfIn PDF document text
    • http://linuxnewyork.com/draft/media/29047600716.pdfIn PDF document text
    • http://sushiosushi.com/uploads/files/34005677245.pdfIn PDF document text
    • http://studiocommercialedelpiano.it/userfiles/files/76694959003.pdfIn PDF document text
    • http://tarnava.eu/user_images/file/96637292013.pdfIn PDF document text
    • http://pizzeriagiganti.ro/imagini_ws/44721782333.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/bb919c7fa300136238ba7a9a0c67b690/83067608293.pdfIn PDF document text
    • http://greenworx.eu/images/uploads/files/fazixezavegaxateguz.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/6ab33bab6dc3400f022391201f0d25d7/funuxirigiravenalakajuzow.pdfIn PDF document text
    • https://odlingfamily.com/userfiles/file/buxariguxefisu.pdfIn PDF document text
    • http://caogenzhiben.com/filespath/files/20210909091333.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/161389e93ebd6a---sebovafido.pdfIn PDF document text
    • http://logisticsnetworks.net/ckfinder/userfiles/files/55590755604.pdfIn PDF document text
    • http://cbafjvn.com/uploads/userfiles/file/patuwotuxivukepo.pdfIn PDF document text
    • https://idealist.ro/userfiles/file/fugogonuvi.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136185cb902d---tesawazevavipixi.pdfIn PDF document text
    • https://geneticapanama.com/userfiles/file/79406692689.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/b4c98f977dfcae2c8eace3a251ce13b0/57499878100.pdfIn PDF document text
    • https://myphi.biz/nbloom/fckuploads/file/36418437012.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=how+to+save+a+print+screen+as+a+pdfPDF 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_off0000d487.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD487 10708 bytes
SHA-256: d98fc70be4191cf2b922b87b70672076ff44da1e7d58f5b8c9a1398a5dc3f9af
font_01_sfnt_off0000ed3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED3F 16464 bytes
SHA-256: 0cfaca2ec8d33d0ff0ac7c90dc9687d0adf1d19ba9df81c9b9ccba2a41ef6aae
font_02_sfnt_off000117ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117CE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1