Malicious PDF — malware analysis report

Static analysis result for SHA-256 03562bcfe3e99d35…

MALICIOUS

PDF

97.9 KB Created: 2021-07-08 13:06:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: dca332ca9dfdeace1203b3747c544a34 SHA-1: a07d3d0081513dc84bf25a7de7da718baeebe4cb SHA-256: 03562bcfe3e99d35a8de1d15e964f35c899a7560142153b820a3f83eab3f5cc4
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of a phishing or malware distribution lure, evidenced by numerous links pointing to compromised WordPress uploads and disposable hosting domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious content or download further payloads. No scripts were extracted, but the extensive link farm suggests a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9800

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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://rcot.by/pics/files/werixejavamajuwow.pdf In PDF document text
    • http://aotwresort.info/ckfinder/userfiles/files/tajasibilefafulib.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16088398a59a7a---wunege.pdfIn PDF document text
    • http://nwatchonline.net/userfiles/file/82172751625.pdfIn PDF document text
    • http://ciskmv.com/css/file/3382056556.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/497d4bef32954cc744148e434f4f0fbf/4266654399.pdfIn PDF document text
    • http://canoeing.by/pics/files/27268176006.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/d33012f9693ec93dc345daf984120acb/kemaduxifixepumepe.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/nifubuvepofa.pdfIn PDF document text
    • http://perilatomsk.ru/ckfinder/userfiles/files/34165303540.pdfIn PDF document text
    • http://morard-mcf.fr/data/Files/33907368094.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16099d6ddc52a0---jixozazebizololejijez.pdfIn PDF document text
    • https://dodatkireklamowe.pl/web/uploads/files/wopigotavivuxi.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/7fs4ra1u1cjlcisdv7nlb55df4/53706126101.pdfIn PDF document text
    • http://gryfarmerskie.pl/pliki_wyswig/files/86916857157.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160804a6cd3fda---35473417069.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093a934671e7---44191679282.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/1607e359e31e22---kufizawitidadikavamuriwil.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/ec8bc5ce37ec071279f90405d6c3106e/16111676343.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073b0538345a---vixegumawap.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b0bbfc42cef---43952089374.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16085ef311af2e---kitiw.pdfIn PDF document text
    • http://euroinstytut.pl/galeria/file/19334793457.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160813d0a85107---pusafove.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/copvqfa7de4pv436r3o8u1ja49/81585430307.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606e3a15d6894---26794990153.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=adjectives+to+qualify+a+good+personPDF 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_off00011c82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C82 16732 bytes
SHA-256: 6f4ccf6c4f570904bd416dbd320647c4faaea81cd7c480d81ffa95a7289150fe
font_01_sfnt_off000147a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147A8 11332 bytes
SHA-256: 1421b79b98d2d197d781b305c546f4755901921afa12572e803ee2df5a5ba63d
font_02_sfnt_off000161f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x161F2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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