Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c42b6d873492065…

MALICIOUS

PDF

69.2 KB Created: 2021-09-18 19:33:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ac8479f1290bc7a57306086454d36cc1 SHA-1: 84554180349a2be5231c50229edc1e232fe72dd7 SHA-256: 6c42b6d8734920653faf4f64ad075c1e08e713be3a8822fa7811e3da45e5d5e1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users to malicious sites. The presence of multiple external URIs, including one pointing to a raw IP address, suggests an attempt to host or link to further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://drzwiukryte.pl/userfiles/file/pinewibozosivimo.pdf In PDF document text
    • https://proia.bg/userfiles/file/zabemejunipuxezoxuwexex.pdfIn PDF document text
    • http://oskarmak.com/userfiles/file/zalixijalugoxebu.pdfIn PDF document text
    • http://www.hro.ait.ac.th/js/ckfinder/userfiles/files/jedazefenejanorogosugibav.pdfIn PDF document text
    • https://piataafacerilor.ro/app/webroot/files/userfiles/files/livigenajopubedof.pdfIn PDF document text
    • http://4seasonstours.in/userfiles/file/sagademetopose.pdfIn PDF document text
    • http://rsport.eu/yonexshop/static/file/80075275330.pdfIn PDF document text
    • http://videlec.be/ressource/file/64551105726.pdfIn PDF document text
    • http://mosme.org/uploadfile/files/86709559895.pdfIn PDF document text
    • http://www.toptehnik.si/images/dujuzadenuf.pdfIn PDF document text
    • http://cbcom.fr/ressource/site-image/files/29992169557.pdfIn PDF document text
    • http://chipublichouse.com/ckfinder/userfiles/files/leporo.pdfIn PDF document text
    • http://dailycan.com/userfiles/files/jozakuvesovekekirozeta.pdfIn PDF document text
    • https://farmacieitaliane.com/documenti/file/60903636602.pdfIn PDF document text
    • http://opuspointpartner.com/ckfinder/userfiles/files/42547977742.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/a4esc5coqabq6tunf30g1mq9fn960ue1/2775767843.pdfIn PDF document text
    • https://okazdedziecko.pl/_files/Media/file/gawamonanezujuda.pdfIn PDF document text
    • http://aotwresort.info/ckfinder/userfiles/files/bumuvidovunoxofov.pdfIn PDF document text
    • http://nikkenj.com/userfiles/file/19209050252.pdfIn PDF document text
    • http://gsemilia.it/userfiles/files/jesurebimomisibuniwan.pdfIn PDF document text
    • http://picart-personal.pl/fckupload/upload/file/38752374440.pdfIn PDF document text
    • http://tano-cable.com/d/files/fitoxigo.pdfIn PDF document text
    • http://140.121.180.103/ckfinder/userfiles/files/fekegiravavokez.pdfPDF link annotation
    • http://wowbond.com/upload/Fckeditor/file/63205471602.pdfIn PDF document text
    • https://jnvhardoi.org/ckfinder/userfiles/files/97798949010.pdfIn PDF document text
    • http://morard-mcf.fr/data/Files/64797236135.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=malware+for+android+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_off0000b426.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB426 10160 bytes
SHA-256: d1af291bc345e2161e608931641396cf81c19e0d0370f976147cffa4129e5f30
font_01_sfnt_off0000cafc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAFC 14380 bytes
SHA-256: 9506ba870d2c93de7ec06167e01b435913006fffc41dbb00779069ad5d8b06b9
font_02_sfnt_off0000eef1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1