Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e1bb880f4b3faf6…

MALICIOUS

PDF

67.6 KB Created: 2021-09-27 20:46:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 7c53850aee6ea8f4961fa9a3f8a554cb SHA-1: da1a4182df2d7d3636d9937eb45aed49272e3ce1 SHA-256: 7e1bb880f4b3faf644cda1cf5ca075bbc32597938ecda7acfaf2f1b87b591e41
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. The 'PDF_IMAGE_LURE' heuristic indicates it's an image-based document with a clickable action, designed to trick users into interacting with an external URL. The presence of numerous distinct hosts and disposable domains suggests a link farm used for distributing malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/161477663b7946---vutikepoxoporaluluzuxuj.pdf In PDF document text
    • http://pixel-pro.ru/upload/file/71961811303.pdfIn PDF document text
    • http://tfforming.ru/d/files/dogavovuworadevoj.pdfIn PDF document text
    • https://stpeterscbs.ca/ckfinder/userfiles/files/30510342271.pdfIn PDF document text
    • http://www.logistiekverbeteren.nl/ckfinder/userfiles/files/27497839205.pdfIn PDF document text
    • http://haohanlegend.com/Uploadfiles/files/sugoxunelexovutinad.pdfIn PDF document text
    • http://biancoacolori.it/userfiles/files/4314335307.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/daxowezemugadelufeledi.pdfIn PDF document text
    • http://vivo-mebel.ru/upload/file/rawosu.pdfIn PDF document text
    • http://shanghaiqingchen.com/upload/files/bozisaxunisejunebofubi.pdfIn PDF document text
    • http://diennuocdanang.com/uploads/image/files/78197645155.pdfIn PDF document text
    • http://recrute.fr/files/files/nukilofuwafozidaje.pdfIn PDF document text
    • http://www.domplit2006.ru/ckfinder/userfiles/files/fagar.pdfIn PDF document text
    • https://tort-art.ru/userfiles/file/piduxajuwotofud.pdfIn PDF document text
    • https://bakwanudang.com/contents/files/29205447043.pdfIn PDF document text
    • http://saconsultancy.com/userfiles/file/pazojapefivefotumeba.pdfIn PDF document text
    • https://lerivagedesmilleetangs.com/caningest/images/file/mepinajemomed.pdfIn PDF document text
    • http://catherine-massage.com/ckfinder/userfiles/files/pekatamizazebeborim.pdfIn PDF document text
    • https://callmarkinvestments.fortunekenya.com/callmark/files/89299268704.pdfIn PDF document text
    • https://websbag.com/uploads/files/67676428046.pdfIn PDF document text
    • https://inprovit.com/ckfinder/userfiles/files/83854985913.pdfIn PDF document text
    • http://caythuocdangian.net/images/files/wabinokune.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614c63fa97991---jajitidazefus.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=stock+android+galaxy+s4PDF 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_off0000ac75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC75 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c487.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC487 13712 bytes
SHA-256: 0bf95df65ef2e5cd36165bf8e8925beef26ae0fdedb520790c54146bcf43643a
font_02_sfnt_off0000e650.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE650 10876 bytes
SHA-256: 9d47af429dcb545f4a35b1128a8a9d85cdea9557ff1524c570bd13211f3f5f0e