Malicious PDF — malware analysis report

Static analysis result for SHA-256 50a2107213b20335…

MALICIOUS

PDF

84.7 KB Created: 2021-08-19 02:42:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 105e2b8d5f8e7256e985928f65a61b14 SHA-1: 1bcbe7b69bc375e70aa696d3a42e456a8366ff83 SHA-256: 50a2107213b2033530884b7e0645fc1d69914e44662a87fe1173f9a8633a5bc1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to compromised websites, likely intended to host malicious content or facilitate phishing. The heuristic findings indicate it functions as a link farm on disposable hosting, designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://crysiq.ru/uplcv?utm_term=como+funciona+vernier PDF link annotation
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f28793de6b5---52632476281.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fcc802a9c80---gebikoluda.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16086ee7cc39c3---18830266066.pdfIn PDF document text
    • http://jogamiskolc.hu/ckfinder/userfiles/files/gubewomunege.pdfIn PDF document text
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/444d14da82201edd5a0d9a0e9d0c0c13/guvibutulinediregin.pdfIn PDF document text
    • http://studiolegalezullo.eu/userfiles/files/32145778897.pdfIn PDF document text
    • http://zs-oilfieldequip.ru/d/files/gelegabafijomiwovik.pdfIn PDF document text
    • http://sobsai.com/ckfinder/userfiles/files/86602744754.pdfIn PDF document text
    • http://yearbookplus.com/uploads/ckfinder/files/xiwugibi.pdfIn PDF document text
    • http://refah4ter.info/basefile/hotelrefah4terir/files/70510267052.pdfIn PDF document text
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/ccda1bc55422060e179c9b0f7e49a3d6/48242390824.pdfIn PDF document text
    • http://tebsc.com/clients/84181/File/95866704650.pdfIn PDF document text
    • http://studiotravenzolo.it/userfiles/files/notozewovanaxori.pdfIn PDF document text
    • https://digicpictures.com/downloads/38180681861.pdfIn PDF document text
    • http://bukharaalpharetta.com/sites/default/files/file/84978265644.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/ed8chp8aa561hthgput5frld46/92613503074.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f4d846c0f62---43793802004.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a13ed4c167a---zitijotisulunozu.pdfIn PDF document text
    • http://crosswaysrecruitment.com/userfiles/file/xupebopi.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/14e10c39a26376a1ebaee42b84307d42/74629913002.pdfIn PDF document text
    • http://hacoauto.vn/upload/files/varefozakuniwefaz.pdfIn PDF document text
    • http://xn--80aafbkbafwdti1ahihccrg.xn--p1ai/pict/file/wusazumosu.pdfIn PDF document text
    • https://clubsecurite.fr/webroot/upload/files/28644160030.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/qlokd1du480682nk13lnbd5hnb/52924267140.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_off0000e6a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000febe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEBE 10384 bytes
SHA-256: 672df7404aa03f21e20f066273d3bf22bdcce58b16f36f88010e215740b32564
font_02_sfnt_off0001163d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1163D 17364 bytes
SHA-256: 872263c3c8391cc5cda775bc5aacb869f20ab791e0849de17e9bbef3a91f3593

Open this report in the interactive analyzer, or submit your own file for analysis.