Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7dd1c6f0142e7d7…

MALICIOUS

PDF

79.8 KB Created: 2021-09-15 09:06:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: df661048f9345ff5a37764ddb2a0fc8e SHA-1: bf42dc6907ad2833c566c5fbbf13d4f793341203 SHA-256: c7dd1c6f0142e7d72e0ae6a1fa861b9607b7e7dc5cbe765c5822b30872b30a8d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users. The presence of external URIs and the overall structure indicate an attempt to lead users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://www.mnogotrop.com/ckfinder/userfiles/files/37505716097.pdf In PDF document text
    • http://xn--80aatg4aaaddkhfhbf3evf.xn--p1ai/ckfinder/userfiles/files/5275989985.pdfIn PDF document text
    • http://www.rupankar.com/fckimages/file/winomifogulelojojiw.pdfIn PDF document text
    • http://jinsonmetal.com/Upload/file/41571498611.pdfIn PDF document text
    • https://tpk-m.ru/files/file/zufudesodudowalaleginato.pdfIn PDF document text
    • http://ticketsperiodico.com/galeria/files/fodorugekatumidajalobisad.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/e76679a9da8e2b848e54893e89c26c1b/1234046451.pdfIn PDF document text
    • http://ed-union05.ru/files/file/11019687250.pdfIn PDF document text
    • http://rosniyom.com/userfiles/files/8703005901.pdfIn PDF document text
    • http://sendedianqi.com/upload_fck/file/2021-9-5/20210905185921611242.pdfIn PDF document text
    • https://ikorti-iao.com/userfiles/files/78964097983.pdfIn PDF document text
    • https://childprotectionindia.com/lexcyberia/userfiles/files/76003829918.pdfIn PDF document text
    • http://praconsulgroup.ru/pict/file/18663467219.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/161338e9faec00---xidazovazezomitegigumibi.pdfIn PDF document text
    • http://2m-m.eu/userfiles/files/91270332386.pdfIn PDF document text
    • http://www.civilhospitalpalampur.in/img/uploads/files/67735189895.pdfIn PDF document text
    • http://emilygrilltogo.com/uploads/files/movarofezeg.pdfIn PDF document text
    • http://ukrkarta.ua/fckeditor/userfiles/file/jomofolire.pdfIn PDF document text
    • http://uptownfallschurch.com/uploads/files/52518661773.pdfIn PDF document text
    • http://sentralperdana.com/file/dufusogibat.pdfIn PDF document text
    • http://abcgsgeds.friendship-match.com/upload/files/63736725029.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/8dd965bca9f1705088b2544c4a0a3e69/70588079705.pdfIn PDF document text
    • http://miass.realxenon.ru/uploads/files/75488390298.pdfIn PDF document text
    • http://gazosilikatnn.ru/uploads/files/mosigalimenil.pdfIn PDF document text
    • http://alfadent-volg.ru/images_uploads/files/50174501325.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=zombie+roadkill+3d+mod+apk+downloadPDF 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_off0000d2b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2B3 10740 bytes
SHA-256: d0145e3f26b50bc129a685016f6349f2af4b99295aa10b389d91834758da523f
font_01_sfnt_off0000eb28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB28 17868 bytes
SHA-256: 279581dbff9d014ed7c64887ada5dfbd7503362039f5778b57be5dc6ddb925e5
font_02_sfnt_off000119ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119AD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1