Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ec2ab26bff374aa…

MALICIOUS

PDF

81.7 KB Created: 2021-09-17 00:46:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 03865eb2471270da4dfb84a401038969 SHA-1: fe15692eef67b887d052e914afc026ebcc31a6a2 SHA-256: 4ec2ab26bff374aa7d07884cc48909a3de6c150fecc5ea5beeed514a29f1f007
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs and is flagged as a link farm on disposable hosting, suggesting it's used to redirect users to potentially harmful sites. The presence of embedded URLs and the PDF structure point towards a phishing or malware distribution lure, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://drafthe.ru/uplcv?utm_term=photoshop+to+pdf+online PDF link annotation
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/xeredekifu.pdfIn PDF document text
    • http://fasson.vip/images/editor/files/zavosukitarogasibawisum.pdfIn PDF document text
    • http://xn--80aa5alfu.kz/file/33515655833.pdfIn PDF document text
    • http://kanchanaspa.com/ckfinder/userfiles/files/80891651336.pdfIn PDF document text
    • http://zxpgw.com/userfiles/file/36390751788.pdfIn PDF document text
    • https://hongmao.tw/uploads/files/202109111112161278.pdfIn PDF document text
    • http://huiking.cn/uploads/file/160805347440.pdfIn PDF document text
    • http://auroraenergyproject.it/userfiles/files/51473764800.pdfIn PDF document text
    • http://www.prieteniitehnicii.ro/documente/file/talejivurudobuxebax.pdfIn PDF document text
    • http://daegyung.kr/userfiles/file/20210907122701.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612fd1091e9b8---fodipuritaketo.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613284866a920---lisirelazenetonil.pdfIn PDF document text
    • http://greenlivinggarden.com/htdocs/UserFiles/file/26966993591.pdfIn PDF document text
    • http://kidneytracker.com/ckfinder/userfiles/files/geriwu.pdfIn PDF document text
    • http://abwsalisbury.com/uploads/files/janubipejasoguzigutap.pdfIn PDF document text
    • https://olivierdaulte.com/ckfinder/userfiles/files/menasog.pdfIn PDF document text
    • http://starroadchina.com/userfiles/file/sanimanivow.pdfIn PDF document text
    • http://gestaocipa.com/public_html/Imagens/file/galovekoromufopatem.pdfIn PDF document text
    • http://mdsalon.ru/img/lib/file/vodijenopedatom.pdfIn PDF document text
    • http://sportingfoundation.com/uploads/file/lusuxaromalebiwuxujun.pdfIn PDF document text
    • https://mama-light.net/business_school/uploads/file/rizezuburi.pdfIn PDF document text
    • http://cdenito.net/userfiles/file/62217065323.pdfIn PDF document text
    • http://mmprogetti.it/userfiles/files/xagal.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_off0000db71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB71 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f388.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF388 10336 bytes
SHA-256: ff32a054968f69e0f446ffe9ed5606b45e4332639e93de1f78cbbac850057d76
font_02_sfnt_off00010abc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ABC 18192 bytes
SHA-256: ff4bab45e0cb773328c2136e77b51cbd48d8ac64cd7c9093544d78562d34a375

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