Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce338727a1062c6b…

MALICIOUS

PDF

100.5 KB Created: 2021-09-02 07:51:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: f81f74c1bf0a1d50849972fd56d1124f SHA-1: 8604f6fa61729e5cdee1ef4193352e99b14137b7 SHA-256: ce338727a1062c6b7a8532e102dd78c2e4b4356eb518528790c12c328b3ecbc2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the nature of the heuristics point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/ca9699dc1a0b629416b2319bf0dec60b/mizanuvodapoladed.pdf In PDF document text
    • https://dcimx.com/files/kedegakesujifazagakuxig.pdfIn PDF document text
    • http://homestationrealty.com/userfiles/files/76133891329.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad91d52c54d---96393413031.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608893d04b470---41000274658.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c395026861a---govinoletuvigumunutepexi.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7d40808568---56161136291.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082c5f173354---vubutez.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/lfaofc5ejsefs4356j7nfcmc3j/nepepotovireriwavowex.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/283307e58e17ed14727a0cd8bf84b81f/89207006409.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1610557789a8d7---pewigakiraz.pdfIn PDF document text
    • http://ashioke.com/images/library/File/88057338194.pdfIn PDF document text
    • http://didopack.com/files/weromaromapar.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///50121150667.pdfIn PDF document text
    • http://zae.me/datafiles/file/kigodufijuworiwojodabi.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b357c6b0320---89094234577.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/8887536284.pdfIn PDF document text
    • https://stbenedikt.ch/userfiles/files/defifa.pdfIn PDF document text
    • http://bluecreator.biz/ckfinder/userfiles/files/mibokupuxivezoliwepar.pdfIn PDF document text
    • http://nm-union.ru/ckfinder/userfiles/files/patudikokefipowerel.pdfIn PDF document text
    • https://newtech-utm.pl/userfiles/file/41847433297.pdfIn PDF document text
    • https://energooptima.hu/upload/File/73494678387.pdfIn PDF document text
    • http://dyneco.kr/userData/board/file/40003600155.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=warrior+task+and+battle+drills+level+1PDF 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_off00012264.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12264 10584 bytes
SHA-256: 83ae15ca3cb20c92e94e4c9eef204a466e0b806d7b65b580c7923b8a74b3332c
font_01_sfnt_off00013abd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13ABD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000152cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152CF 19004 bytes
SHA-256: 93cda2023a53b2f056a4902f6f24fa2dd54b3899be8fec5702faacb2abda3035

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