Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d053e6670cb9102…

MALICIOUS

PDF

89.6 KB Created: 2021-09-20 11:53:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 9f5672678a19f81a2cadfd2e9bfe88ac SHA-1: 9a61d54bdf80cb088996988df22c63835b7e7b33 SHA-256: 1d053e6670cb9102de7e2eb74122634a5cd0fc6ca8f64f3baf8e8cb5d84feb95
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains numerous embedded URLs pointing to disposable hosting domains, suggesting a link farm or redirection mechanism to phishing sites. The PDF structure and embedded content indicate an attempt to disguise malicious links as legitimate files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://coretry.ru/uplcv?utm_term=ms+word+manual+pdf PDF link annotation
    • https://firsatpin.com/calisma2/files/uploads/60512039176.pdfIn PDF document text
    • https://lixtech.com.tw/ckfinder/ckfiles/files/xatagirenavokenowoboxufom.pdfIn PDF document text
    • https://mldom.xyz/web/img/podborky/files/jizapuwus.pdfIn PDF document text
    • https://globalcareerclub.com/FCKeditor/userfiles/file/nobalusevoworoxudilitez.pdfIn PDF document text
    • http://pm-property.pl/userfiles/file/71588081905.pdfIn PDF document text
    • http://studiosiciliani.eu/userfiles/files/30712490650.pdfIn PDF document text
    • http://abwessex.com/uploads/files/narazibiviga.pdfIn PDF document text
    • https://kujainspectors.com/candyticket/uploads/page_images/files/vuvifabasogonawuxu.pdfIn PDF document text
    • https://nexapos.com/upload/files/pizol.pdfIn PDF document text
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/c069ut6tlahr728lpp3cic0ck2/libefokavukuw.pdfIn PDF document text
    • http://lollanaclinic.com/image/upload/File/16885083708.pdfIn PDF document text
    • http://stardentalcare.org/userfiles/file/1446463108.pdfIn PDF document text
    • http://unseretochter.ch/images/file/70490144801.pdfIn PDF document text
    • https://lecormier-menuiserie.com/www/upload/files/76278844504.pdfIn PDF document text
    • https://pasationtravellers.com/root/FCKeditor/file/kanobowiwiwifuxazajobo.pdfIn PDF document text
    • http://zechnerbau.at/images/content/files/puvototipab.pdfIn PDF document text
    • http://studiolaviano.it/userfiles/files/45587821579.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/d312a06026fd94eb8e3d8c2a35e65abe/44717774732.pdfIn PDF document text
    • http://woori-tour.kr/FileData/ckfinder/files/20210913_70FFEE059D9CF509.pdfIn PDF document text
    • http://businessplan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/nagisolon.pdfIn PDF document text
    • http://klick-tipp.at/ckfinder/userfiles/publics/files/93688943034.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_off0000f82b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF82B 18972 bytes
SHA-256: a67d62a07b2399ec525cb4f2255d3db36c1a903cc9f83b766e11542164523305
font_01_sfnt_off000128ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128EE 10516 bytes
SHA-256: 34ad9f81fd8184cc472e70a82acb5eca8dc2abca128983abb7b90f0a1dd1ae05
font_02_sfnt_off000140e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140E7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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