Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e2639e09bfa1ddc…

MALICIOUS

PDF

68.0 KB Created: 2021-09-27 01:34:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 62e18ab66f563c3ebc8252af239526bc SHA-1: c3cf9290ed321fc1effa298b78d0cd0424e7311c SHA-256: 9e2639e09bfa1ddce44615c76302894cbda0055888c00e9ac9c232e87b6a37d2
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as an image-only lure, a common tactic for phishing campaigns. It contains numerous external links, including one to 'oniceh.ru', suggesting it directs users to malicious or deceptive websites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to distributing further malware or conducting phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 https://oniceh.ru/uplcv?utm_term=apk+to+java+compiler PDF link annotation
    • http://sooam.com/files/fckeditor/file/213727121961386e1403943.pdfIn PDF document text
    • http://travelshops.pl/userfiles/file/fakejijajifexulewosavex.pdfIn PDF document text
    • https://collinite.pl/userfiles/file/48268509216.pdfIn PDF document text
    • http://musicpark-live.com/userfiles/file/wulitonebuvogetifusok.pdfIn PDF document text
    • http://medicareclinichowrah.net/faboriginelist-braj/userfiles/file/49697522257.pdfIn PDF document text
    • https://bcbc3399.com/upload/files/zatigawixodinus.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/161395913213a7---84776050462.pdfIn PDF document text
    • https://bibliotheque-des-arts.ch/ckfinder/userfiles/files/xewakuborekadop.pdfIn PDF document text
    • http://distant-property.ru/fck_editor_files/files/78082846215.pdfIn PDF document text
    • http://riverla.vn/uploads/userfiles/file/17504393516.pdfIn PDF document text
    • http://lineshare.net/upload/files/20210907001043.pdfIn PDF document text
    • http://concilianavarra.com/userfiles/files/86453805067.pdfIn PDF document text
    • http://jiendurancecoaching.com/ckfinder/userfiles/files/16952202446.pdfIn PDF document text
    • http://cochemical.com/upload/files/joriwevaju.pdfIn PDF document text
    • http://laskod.hu/userfiles/file/jerolifigowilixove.pdfIn PDF document text
    • https://bedandbreakfastholten.nl/userfiles/file/tizexoluborozakenetubume.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/jirawapax.pdfIn PDF document text
    • http://hotelrealerimini.it/userfiles/files/bipepe.pdfIn PDF document text
    • http://osteriailgalloelinnamorata.com/userfiles/files/8955338624.pdfIn PDF document text
    • https://mantyobras.com/userfiles/file/tagiripazu.pdfIn PDF document text
    • http://www.kymkarajok.net/tiedostot/files/tatiresililikotezizilo.pdfIn PDF document text
    • http://studioaeditecne.it/userfiles/file/93065165215.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/phtg8fjovimjgn11anuc4e0l8m/rekakudeb.pdfIn PDF document text
    • https://annekienlen.fr/imagesfile/dixinusazesumelapeso.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_off0000ae8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE8B 14344 bytes
SHA-256: afaab4e78dc273b66f06514da57367c416210a15183f02259440c650e3b45828
font_01_sfnt_off0000d253.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD253 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ea6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA6A 10532 bytes
SHA-256: 2305a959c525cd5e1e5c1ebe7cc14219d30085b3725bd83d786c2c2b13c7076e