Malicious PDF — malware analysis report

Static analysis result for SHA-256 048aad208c7fdd59…

MALICIOUS

PDF

80.7 KB Created: 2021-09-16 02:35:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5824f73b2cfe728b2dd877cbd490614e SHA-1: e891c8b8b341d1627b3fb012cb27e76c2b963a0b SHA-256: 048aad208c7fdd59ca86cd7508021af549df7cc7cd0a79395f769a4ec5acedde
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, suggesting a phishing or malware distribution attempt. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to download a password-protected archive, a common tactic to bypass gateway security. The ML classifier and ClamAV detection strongly support the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://chcial.ru/uplcv?utm_term=contra+evolution+download PDF link annotation
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138f7479a4bc---99458592297.pdfIn PDF document text
    • http://gat-asset.com/CKEdit/upload/files/30848393011.pdfIn PDF document text
    • http://studiolegaletrotta.eu/userfiles/files/vogakonewajuwowuwelemod.pdfIn PDF document text
    • http://tnslib.net/userfiles/files/39159398586.pdfIn PDF document text
    • http://surmounttravel.com/userfiles/files/tamiwuligewunarejonelobuk.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613d75ec541a6---97569945574.pdfIn PDF document text
    • http://ilonew.tasksplan.com/ckfinder/userfiles/files/sabopoxuv.pdfIn PDF document text
    • http://csc-021.com/userfiles/file/20210914050609_nfkyb4.pdfIn PDF document text
    • https://onlinendttraining.net/files/94255542019.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/8a5b8869dc57001ccd52fd48514bbd0e/xugife.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/45249119589.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16141ed3a81742---1353485210.pdfIn PDF document text
    • http://atdawnwelift.com/userfiles/file/kixanojomovusanop.pdfIn PDF document text
    • https://mraos.com/web/userfiles/file/waxobiwugenut.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/5954b4329a3a6be358b05b762d25fdec/90796272187.pdfIn PDF document text
    • http://palestraarkadia.it/userfiles/files/gemirisudarotuloko.pdfIn PDF document text
    • https://rpaxis.net/userfiles/file/23858100955.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613d70511c8b7---33814609379.pdfIn PDF document text
    • http://csc0516.com/userfiles/file/20210912231537_h1tnaa.pdfIn PDF document text
    • https://cardolf.ro/files/33962585126.pdfIn PDF document text
    • http://kkslavicin.cz/sites/default/files/file/faniluzumutor.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16133653361c84---16165999808.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_off0000d787.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD787 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF9E 10356 bytes
SHA-256: 7186d543bd646b26fe41ee950d129c8be80e4f706ab04911815bec833bbe451f
font_02_sfnt_off00010727.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10727 17804 bytes
SHA-256: 80e12249cbbbe758de991b1bf6ef80b9206d4aad2f5e9a27b12c92cad2852acf

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