Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ac95bbb25a3905b…

MALICIOUS

PDF

117.7 KB Created: 2021-06-13 21:41:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 9b3e5551b5ce26c7147760ebf22ea3c6 SHA-1: 7f7aed95bac3ca1503aa518498330d12d1df03fe SHA-256: 7ac95bbb25a3905bf11a2e6c15c789fcbcb1abda8c0f663af3e819105d553cfc
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external sites, many hosted on compromised WordPress installations, suggesting it functions as a link farm or a lure for phishing. The presence of a 'Password-protected archive handoff' heuristic suggests the document may be instructing the user to download an archive that requires a password, a common tactic to bypass gateway security for malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://garglob.ru/uplcv?utm_term=beverly+hills+90210+season+10+episode+27+online PDF link annotation
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a96b3c70be4---29832858112.pdfIn PDF document text
    • http://itkaufmann.com/images/fckimages/file/63733432844.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ea43715ec3---18315485658.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160a7b54faa157---ruroxinumo.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606da0c19984e---82326965778.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ae558107430---jokojofepozukumawiwamali.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/nmip6o2gk7avicu2m2phmahnie/64935211018.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/wesebo.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/256508ef623ce22fb957e36819024254/6690434008.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/3949280a2d171fc07cecc0e7fbe8fb72/19828534083.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/b8krude6qbo5n4suee8dbks4cu/pisado.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd178916e45---25000823035.pdfIn PDF document text
    • http://rudolphalexander.com/uploads/files/80988217330.pdfIn PDF document text
    • https://alsterparkett.de/wp-content/plugins/super-forms/uploads/php/files/pc4v31f249olv62jae195r6shj/76130912110.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/9c16a58c1eac66e34aa088741264eb95/petiresaxumisoxer.pdfIn PDF document text
    • https://www.adilaltinsoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e9e2fa7a0d---95908655910.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17273 5528 bytes
SHA-256: b66836e010bc9c71590b0e22056cf69e415312be4db6bca6d8e4abd74b895cf9
font_01_sfnt_off00018534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18534 4432 bytes
SHA-256: a628150beaeb071b4e99700a6b102590b40671ce371c2d775592064c0487178e
font_02_sfnt_off00019392.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19392 11312 bytes
SHA-256: 2dedbfd66cddf1e8ae6f83909b3db72596c0d2476a3df3478d5a2c32c91282dc
font_03_sfnt_off0001ba1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BA1D 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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