Malicious PDF — malware analysis report

Static analysis result for SHA-256 58bc55e4d6515ddf…

MALICIOUS

PDF

90.4 KB Created: 2021-08-23 09:29:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 688c5e706d312fd941b35e0a6e5bc764 SHA-1: 422761f3d5f804261123b1bec0369e13218579a4 SHA-256: 58bc55e4d6515ddf9b2bc240b322719d80ed4f61bb0cc495ab15cd8254867720
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1539 Steal or Forge Credentials

This PDF document was flagged by a machine learning classifier and ClamAV as malicious. Heuristics indicate it functions as a link farm, potentially leading to credential harvesting or MFA abuse. The document's structure and embedded URLs suggest it is designed to trick users into providing sensitive information, likely through a phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

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
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://kepco-group.com/uploaded_files/userfiles/files/26039268557.pdf In PDF document text
    • http://bjsixiang.com/jingkelun/userfiles/files/20210701015540.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/acbc98dd25ac0c784f947d5596814bd2/wifimirukuju.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/dc216c1632cbf37825f3c8e32e1bd011/34840514391.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/329933ba825c3517d2fc7a679c108add/81077476589.pdfIn PDF document text
    • http://flgr.ru/files/files/vudixi.pdfIn PDF document text
    • http://weberstellen.ch/userfiles/file/15209181026.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/2e9b4eb8c56c7fa01484d6c5decb4fc3/16260574605.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/0b96534e55c86becb563f5ba98218992/lufimamaxokemusejimezada.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/54439221845.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e01748ebc18---81143525689.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/8d131535722144777f4dc4015db6324d/24129889609.pdfIn PDF document text
    • http://robinsonfamilyreunion2021.com/clients/7/77/7769cd5c98d63cfb9738ae2db1c5c42c/File/fikedogugipiburorezebibop.pdfIn PDF document text
    • http://promocode.lu/userfiles/files/mikotedebejaguvejej.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607fcfa78b308---tokawifamorujatok.pdfIn PDF document text
    • http://pokemom2.com/uploads/files/tirapabixakagepituneme.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/bilidinuputeduxuz.pdfIn PDF document text
    • http://sotel-perm.ru/site/file/87720343832.pdfIn PDF document text
    • http://twfindia.in/userfiles/files/tesemadufudodabo.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/668b1644524f0236383b833a34631866/natuvapufodiramafokew.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d314ce9d8d---wosupokizupisurafipaxag.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd26873d8d---lefasuguregeferiwejaro.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b78368b3bd7---91314633602.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=easter+in+april+2021PDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e60f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE60F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fe26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE26 10400 bytes
SHA-256: bfd77efebb8b3959e73197bdeb70a48d2c211b3d8af30df5042a8b1efe2c0618
font_02_sfnt_off000115d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115D9 16092 bytes
SHA-256: 9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd
font_03_sfnt_off00012b1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B1A 18384 bytes
SHA-256: 8c9321484351848ed0d97aab134223334dad649393800f6eca65d69723a24fea

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