Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee5546f3c56c97e7…

MALICIOUS

PDF

87.0 KB Created: 2021-08-10 04:42:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 770d557e59e02f636fa5887e7dc01917 SHA-1: a3bdf509c418fc71063008bd67be6d1454616cd4 SHA-256: ee5546f3c56c97e7d6a2648fa1db8a92d9921f6f9b8e7ba63ea4d3a823c5d6c6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV detecting it as a phishing trojan. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate an attempt to exploit users through deceptive links, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://medvor.ru/uplcv?utm_term=how+to+get+canva+pro+for+free+2021 PDF link annotation
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/43dvmkm7vfqi55p8o7av3l3687/27515252760.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16075e3b02ffb8---fadajoxorisenako.pdfIn PDF document text
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/3bc370400975fc7ab777ef782e284e26/kukaguxemowuli.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160dbd6341fffc---99992035718.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/220vqv48e3qtbfseoq4636jq3j/fofujujekuporuda.pdfIn PDF document text
    • http://deficanderel.com/clients/6/67/674a09facce11b7629d390eef9534ff9/File/89081765709.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/kht48fhiu48u23vu300aa1u201/duboxijimibamu.pdfIn PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/9664b9755d2f79239161eca436b44533/30798316489.pdfIn PDF document text
    • http://box8websites.com/ckfinder/userfiles/files/44781438454.pdfIn PDF document text
    • http://sluchatka-shop.cz/files/upload/files/32166275868.pdfIn PDF document text
    • http://rotarylaspalmas.org/documentos/file/zuraforurolavojuzozetob.pdfIn PDF document text
    • http://krzysztofmalec.pl/gfx/fck/file/pesuzuposoxipizetiwina.pdfIn PDF document text
    • http://lidata.eu/files/kapufafimubizilufifugeze.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16081b6e79d34f---pusilusagowafupewoga.pdfIn PDF document text
    • http://vankouwenenmastop.nl/UserFiles/file/bikifepolonexixutumufare.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f8977c9ed6---dolajufawa.pdfIn PDF document text
    • https://penzionradvanice.cz/res/file/73310312868.pdfIn PDF document text
    • http://dent-pro.cz/pic/file/mozamomufizogu.pdfIn PDF document text
    • https://bawwabatrizq.com/userfiles/file/80149021950.pdfIn PDF document text
    • https://tsegypt.com/file/67577051231.pdfIn PDF document text
    • http://nfc.soo.jp/file/26622673262.pdfIn PDF document text
    • https://www.temsilcifirsatlari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608451bde2a64---23914638474.pdfIn PDF document text
    • https://reazfarah.com/ckfinder/userfiles/files/wavabogil.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_off0000ef8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF8F 10788 bytes
SHA-256: 45ad73724564213b3ccf908f0d5f9346024cb57325fa501521f7483f6aa4fb9e
font_01_sfnt_off000108ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000120be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120BE 16972 bytes
SHA-256: f357e3678cff0f0ff35450d85d87bab25eabd3e86dbb72e9efdf57571cf055a9

Open this report in the interactive analyzer, or submit your own file for analysis.