Malicious PDF — malware analysis report

Static analysis result for SHA-256 a239d4da14a711b2…

MALICIOUS

PDF

80.2 KB Created: 2021-09-13 02:24:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 2dc4d2bd374e73091ff1d5a2c3798539 SHA-1: 158cfceabc1e5042104acf66dcdcef98bb2091fa SHA-256: a239d4da14a711b2d0b1eab10faa247cd54fec0d234d50b46595d2a1bb41ee21
156 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 functions as a link farm, directing users to various URLs, one of which is associated with a search term for 'hide my ip license key 2020 android', suggesting a phishing or scam lure. The presence of compromised CMS upload links further supports its role in distributing malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • 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.
  • 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://philabc.ru/uplcv?utm_term=hide+my+ip+license+key+2020+android PDF link annotation
    • http://shepardinteriordesign.com/rw/upload/file/21279836161.pdfIn PDF document text
    • http://tiszaladany.hu/upload/file/zopuwew.pdfIn PDF document text
    • http://gniortho.com/files/Upload/file/sodusuboxovuwusedupil.pdfIn PDF document text
    • http://zeguvietnam.com/uploads/ckfinder/files/914829645.pdfIn PDF document text
    • http://air-separation-supplier.com/d/files/fujiwimufevo.pdfIn PDF document text
    • https://samsungklimamodelleri.com/upload/ckfinder/files/95919377990.pdfIn PDF document text
    • https://digireg.sk/upload/4020711756.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137a8de6fab9---xuwewodepo.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161312d14c1d5e---17293093147.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/16139e89f22329---sulodevavolijevanobika.pdfIn PDF document text
    • https://k31szmq42-nu28.com/contents/files/60805337646.pdfIn PDF document text
    • http://pantanalmsnews.com.br/ckfinder/userfiles/files/74263458661.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cf602973c0---26866559027.pdfIn PDF document text
    • http://qhzs88.com/admin/fckeditor_upfiles/file/2021090521510180554.pdfIn PDF document text
    • http://zhxndl.com/uploadfiles/files/pewufis.pdfIn PDF document text
    • http://workcoop.org/fckeditor/userimages/file/20210906011741.pdfIn PDF document text
    • https://ip-kamera-rendszer.hu/ckfinder/userfiles/files/rabikapiluwelinasonuveve.pdfIn PDF document text
    • https://travelsafeway.com/userfiles/file/wuwozemevudodi.pdfIn PDF document text
    • http://ghettaetamionarchitetti.it/userfiles/files/zusajeza.pdfIn PDF document text
    • http://softwaretesting.kr/club/data/userfiles/file/20210904172353.pdfIn PDF document text
    • https://2b3la571ga-70p.com/contents/files/87029898762.pdfIn PDF document text
    • http://netcentricnj.com/ckfinder/userfiles/files/23788366509.pdfIn PDF document text
    • https://travelsafeway.com/userfiles/file/loguxewewape.pdfIn PDF document text
    • https://asi-filter.pl/files/file/dakelon.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_off0000d58f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD58F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eda6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA6 11016 bytes
SHA-256: 205e6fa0353174c7ab63368a01c4da14672b3ccaaaa0001493e508a449d9bb51
font_02_sfnt_off0001072d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1072D 16816 bytes
SHA-256: b7a2b2a9bdd2c50116e1987a6bbd7c1117093d10db96a47a1f68dc276e42ea7f

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