Malicious PDF — malware analysis report

Static analysis result for SHA-256 f67230f4b9ea29cf…

MALICIOUS

PDF

83.4 KB Created: 2021-09-13 21:15:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e3c3741d504981e824c80165e7b1126a SHA-1: 13583eebfa74169f6103a129588d03ac2530077d SHA-256: f67230f4b9ea29cf62506441a84adeb388b292fca33477005b6ce5800ad8cb0a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The 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 specifically pointing to a suspicious domain ('inwebjor.ru') that appears to be a link farm or redirector. The PDF structure and embedded links suggest it's designed to trick users into visiting potentially harmful external sites, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://inwebjor.ru/uplcv?utm_term=tamilyogi+dubbed+movie PDF link annotation
    • http://www.dfdtrading.sk/ckfinder/userfiles/files/favobubilufexi.pdfIn PDF document text
    • https://marathonroller.com/userfiles/files/ponok.pdfIn PDF document text
    • http://agriturismolionsfarm.it/userfiles/files/99385839492.pdfIn PDF document text
    • https://bd-sokolovska.eu/userfiles/file/solofiribudusobivuxasujo.pdfIn PDF document text
    • http://ntouioc.ntou.edu.tw/ckfinder/userfiles/files/41714105965.pdfIn PDF document text
    • http://polipadel.com/userfiles/file/wakimelelalogaputuwom.pdfIn PDF document text
    • http://angelofthewinds.org/ckfinder/userfiles/files/tidepixosetupej.pdfIn PDF document text
    • http://zzfcw.com/file/fkimg/file/dudakipun.pdfIn PDF document text
    • http://modern-pro.ru/files/file/39525387938.pdfIn PDF document text
    • http://btsoft.vn/uploads/files/69787161184.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/161392b55deb7b---pukogiwojowolew.pdfIn PDF document text
    • http://ch-bovi.com/upload/files/30040204011.pdfIn PDF document text
    • http://biplano.eu/userfiles/files/zefuzatituvonukujo.pdfIn PDF document text
    • http://janjoling.com/public/ckfinder/userfiles/files/sujujepawovalasosimekogu.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/9dc85a17aa386069621fb93c209d58a3/77572819165.pdfIn PDF document text
    • http://shanghaiqingchen.com/upload/files/tabolidunenitogo.pdfIn PDF document text
    • http://vetcasatenovo.it/userfiles/files/81600027349.pdfIn PDF document text
    • https://schachverein-marchhoefe.ch/fcsr/news/upload/file/92216409569.pdfIn PDF document text
    • https://zaindu.drogomedia.com/files/galeria/files/subas.pdfIn PDF document text
    • http://ks4073.com/file_media/file_image/file/90852710144.pdfIn PDF document text
    • https://durgabas.coop.np/ckfinder/userfiles/files/namepojepuxetarogezowesux.pdfIn PDF document text
    • https://beautydiction.com/ckfinder/userfiles/files/xagufuf.pdfIn PDF document text
    • http://www.siphonicflowmandiri.com/upload/files/79717979678.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_off0000db22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB22 10504 bytes
SHA-256: ec7dc580933d1b3b124a3e57048c0b1bb788b1c57e18e6f9bba50e14d95d163e
font_01_sfnt_off0000f2d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010ae3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE3 20608 bytes
SHA-256: ea97f7c10c00f7e9ed1cd5febf48d999c2978a3890330a19eb13ca92f08d2601

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