Malicious PDF — malware analysis report

Static analysis result for SHA-256 040baffdd0f2690f…

MALICIOUS

PDF

90.9 KB Created: 2021-09-03 17:44:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: bf9c11f099395f1e37aee753ae897aa8 SHA-1: 256b9a40cfb29e24bac4fcac0cc51a9246e10d44 SHA-256: 040baffdd0f2690f1ff753be6fa9e8c92fa386d3e7f61a32e3d3f89af3809334
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised websites, indicating a phishing or malware distribution scheme. The presence of external URIs and link farms on disposable hosting suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • 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://nomylo.ru/uplcv?utm_term=advanced+excel+course+pdf+file PDF link annotation
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbcf94cefd0---vukefifuvavadulalogawoka.pdfIn PDF document text
    • https://pisangmanis.com/contents//files/49762679010.pdfIn PDF document text
    • http://kemenyseprosiklos.hu/upload/file/xebuto.pdfIn PDF document text
    • http://happinessgown.com/upload/users/files/88099919658.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/33u1bme76lm1e4lnff2rn4p5s6/53471298883.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/6c602525754ab2c168d441a323e818aa/16257361196.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/ad327ffbd262898cc9b15fe3b3204784/laxar.pdfIn PDF document text
    • http://fioredda.com/userfiles/files/12859313351.pdfIn PDF document text
    • http://shukokai-voves.fr/userfiles/file/34029109742.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/xiwoxoxikedalifowexufuj.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/voo03213nti6o2e3qp3qaun3bn/99623839323.pdfIn PDF document text
    • https://cytairtool.com/test/userfiles/file/20210708_22918.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c17da8e7669---1312273615.pdfIn PDF document text
    • http://aktifbant.com/resimler/files/dezolinezixefegazivufalid.pdfIn PDF document text
    • http://3dtechgroup.com/uploads/image/files/17750377902.pdfIn PDF document text
    • http://hayatteknoloji.com/webimage/file/95178002596.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/ad68bbf79ed0e67694c56b6d35f84c64/pokanuluzudezuf.pdfIn PDF document text
    • https://cqc-material.com/app/webroot/userfiles/files/77556525837.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9b09dc742c---fusegividebizog.pdfIn PDF document text
    • http://yizhu580.com/ckfinder/userfiles/files/11715582705.pdfIn PDF document text
    • http://shsclassof1959.com/clients/a/a7/a7a82b2a6025f7fafce5d77be70bf845/File/vilozetagotofogaxosademu.pdfIn PDF document text
    • https://www.kindspring.org/inc/ckfinder/userfiles/files/wadujojas.pdfIn PDF document text
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b7f3e41e9e8---3951600129.pdfIn PDF document text
    • http://lussoleathertiles.com/test4/EDITOR/example/v2/userfiles/file/18801522900.pdfIn PDF document text
    • http://school15-tyumen.ru/f/wifapeleropigopila.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_off0000fe30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE30 10764 bytes
SHA-256: 2b0f0e08c963d0d808ca82e75828c92736d815151ea52fa91b2b93f78cdbd4b6
font_01_sfnt_off00011717.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11717 17692 bytes
SHA-256: ed102994812931ff6a1608ce060ef928bbe3423fd2cfdaa32a4d160fdd31112f
font_02_sfnt_off0001458c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1458C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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