Malicious PDF — malware analysis report

Static analysis result for SHA-256 68ee786f3132e2f2…

MALICIOUS

PDF

71.0 KB Created: 2021-09-19 01:29:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: d1908d63e658ffc05274d55175477ef6 SHA-1: 3cafdd2dfe90f349ae67d60eba061117ffdfea57 SHA-256: 68ee786f3132e2f29811edd3b139ca94acf7af1239a1cc50d6af1c5b4149191d
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristic firings suggest it acts as a lure for remote support tools, likely to trick users into downloading and executing a secondary payload. The embedded URLs are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://crysiq.ru/uplcv?utm_term=parsec+android+touch+screen PDF link annotation
    • http://toeicspeaking.net/_UploadFile/Images/file/zarujiwi.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/4a04b1055a4882d2c313105720f038ad/65310028248.pdfIn PDF document text
    • http://farmaciafici.com/userfiles/files/lexafometejumebom.pdfIn PDF document text
    • https://tpk-m.ru/files/file/biwaratirexizusiwodi.pdfIn PDF document text
    • http://obras.ru/sites/default/files/uploads/levakepoxesu.pdfIn PDF document text
    • http://www.its-dph.cz/admin/fckeditor/editor/userfiles/file/mumeguguxufuzofitekom.pdfIn PDF document text
    • https://onutglen.com/caningest/images/file/35960194131.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/161419c667ba24---vudubisebem.pdfIn PDF document text
    • https://fundreamz.com/ckfinder/userfiles/files/57454184799.pdfIn PDF document text
    • http://szyldkj.com/luodan/images/userfiles/file/10701494657.pdfIn PDF document text
    • https://studiecarriere.it/uploads/file/xorewe.pdfIn PDF document text
    • http://limobebe.com/userfiles/files/xobunibekeviseveno.pdfIn PDF document text
    • http://koszyczarek.pl/userfiles/file/33201934915.pdfIn PDF document text
    • http://thietkewebbacninh.com/webroot/img/files/luwuduwufoverogexov.pdfIn PDF document text
    • https://everestart.com/images/stories/file/52945961505.pdfIn PDF document text
    • http://cataga.de/beta/files/file/befusununibosiboxepefena.pdfIn PDF document text
    • https://gemicilojistik.com/userfiles/upload/file/munuduvajuvekunut.pdfIn PDF document text
    • http://6nergy.fr/6nergy/sites/default/user/file/93570498166.pdfIn PDF document text
    • http://ingfrimale.com/userfiles/files/kotinulajubo.pdfIn PDF document text
    • https://laurallo.com/ckfinder/userfiles/files/jebibe.pdfIn PDF document text
    • https://tyko.pl/userfiles/file/92900492509.pdfIn PDF document text
    • http://lpkgoodframeupvc.com/userfiles/files/lusasakoj.pdfIn PDF document text
    • https://it-remarketing.pl/app/webroot/media/files/2500635168.pdfIn PDF document text
    • http://urbanposthotel.com/admin/ckfinder/userfiles/files/55094591256.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_off0000b4dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4DC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ccee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCEE 16444 bytes
SHA-256: efcb83b6e1ff8bee9a29d018d024b536d5a803c549c2cac6640b00acc91f4e32
font_02_sfnt_off0000f733.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF733 10520 bytes
SHA-256: ca37e9013db48ad31a60b180bf08753782363ffd3ecbeb57f7bb873f6693c316