Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dca263b0cbfd6d4…

MALICIOUS

PDF

72.9 KB Created: 2021-09-01 02:30:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 8c72aff30f995671c5e99a0fa8a7a69c SHA-1: b65b0fd1234b959739f14a7ca7713f52fab86599 SHA-256: 1dca263b0cbfd6d4a77428239208bebc799f520e673b106da8da7fac85761c1a
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm hosted on disposable domains, a common tactic for distributing malicious payloads. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a method to evade initial gateway scanning. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 https://tailormade-sales-marketing.com/userfiles/file/12933630523.pdf In PDF document text
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/abdcd22f8c24b04f51ed3b5b999504f6/58976397451.pdfIn PDF document text
    • https://oxi-dental.ro/imagini_ws/puwejunubi.pdfIn PDF document text
    • http://emilygrilltogo.com/uploads/files/febasevigav.pdfIn PDF document text
    • http://herningbadintra.dk/app/webroot/upload/files/lugarisamipusonopovunaxuz.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3ee7594db---75037255865.pdfIn PDF document text
    • https://bczenekar.hu/files/file/nobozipafomaxasiwekazik.pdfIn PDF document text
    • https://northwestconvention.cz/data/files/9437217944.pdfIn PDF document text
    • http://nktrading.qa/file/files/navimufil.pdfIn PDF document text
    • https://virker-ikke.dk/files/nawagix.pdfIn PDF document text
    • https://ovalpolycoats.com/media/wizino.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be6c414babe---kepavadetabojesuxujod.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d33c301047---pasogex.pdfIn PDF document text
    • http://newgrids.com/userfiles/file/vizipojogoluvizemibafefen.pdfIn PDF document text
    • https://inprovitparaguay.com/ckfinder/userfiles/files/34993636837.pdfIn PDF document text
    • http://tuzvedo.hu/elemek/file/48856458020.pdfIn PDF document text
    • http://stembridgefamilyreunion.com/clients/0/0d/0db03be1a97f3028174cafb645c8c91f/File/kawozokefulufarenuxidovor.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/b8f5890bf5088e5c407ed9766534d1a2/wunopekenoget.pdfIn PDF document text
    • https://pleasanton.com/wysiwygfiles/file/rinulemalepabemasotifemo.pdfIn PDF document text
    • https://southwestlooms.com/admin/userfiles/files/70623421465.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/bbf13fbe538652cc0cf20cad54874528/75557564934.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/cds5lquod0mehts4956u4rqmgc/13237566073.pdfIn PDF document text
    • http://icmasistemas.com/userfiles/files/651602546.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/0b6582bb934fc1da43a5929c8388afac/malefuxobase.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6fd621a52f---29247772794.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=the+dead+mother+andre+green+pdfPDF 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_off0000ba5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA5E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d270.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD270 16576 bytes
SHA-256: eb56bb765a54989c7d56886d138c4dca52757223c5b2e00612ca1f1fd714af49
font_02_sfnt_off0000fcaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCAA 10600 bytes
SHA-256: 48e758df6c02abb8971dfa04fe882dfc6058987dca7fb681123a6f4dbce33b17