Malicious PDF — malware analysis report

Static analysis result for SHA-256 dab602088fe6e8bb…

MALICIOUS

PDF

107.3 KB Created: 2021-09-06 03:24:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 30bbee1b06c9825a239fb21b7ba2689e SHA-1: 39faf0c9a21ac37d03e91807d209fe0008bd8a07 SHA-256: dab602088fe6e8bbdb301aa7bf6101688b0407e0332b93e3fdeb75d20093ee9f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of numerous external URIs, including links to compromised CMS uploads and disposable hosting, suggests a link farm designed to redirect users. While no scripts were explicitly extracted, the PDF structure and link farm behavior are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9881

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://accomplishtheimpossible.com/userfiles_ati/file/32871810468.pdf In PDF document text
    • http://teaandtiara.ca/clients/c/cf/cffd5a667a547ddf6f7ed7e454f715b7/File/56314932339.pdfIn PDF document text
    • http://taispacedesign.com/upload/files/31872992998.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/2cccc9b5d0f3e895aa0d863ba1defacc/78710887747.pdfIn PDF document text
    • http://smepil.com/ckeditor/userfiles/files/zepidube.pdfIn PDF document text
    • http://1mosref.ru/ckfinder/userfiles/files/29033576405.pdfIn PDF document text
    • http://haniltm.kr/upfiles/editor/files/29509722205.pdfIn PDF document text
    • http://mamolenasnc.it/userfiles/files/66302667349.pdfIn PDF document text
    • https://guapa2.com/admin/fck/file/90661125398.pdfIn PDF document text
    • http://resortvillairene.it/userfiles/files/73481741879.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd357f4163---bogani.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d6601b5f78---66639648751.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a736a9de03e---91287731330.pdfIn PDF document text
    • http://fishngrill.iorderfoods.com/uploads/files/5705201522.pdfIn PDF document text
    • http://christopherdallo.com/file/wixotinugawuxil.pdfIn PDF document text
    • http://energo-market.ru/sadm_files/83934335507.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/595b2npu894io7nr67bdhgp9is/bopujanaxoravufebapotumu.pdfIn PDF document text
    • https://xn--p3t29jo1ed4o4xw.tw/upload/files/mited.pdfIn PDF document text
    • https://listocrm.com/userfiles/files/xetixuwatarigulomilokovik.pdfIn PDF document text
    • http://unsersohn.ch/images/file/zizimibasa.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099ea37d3839---62459020920.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fdb69c483ac---81139977709.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/df0ff6d3f826f853339e0c3824a318c2/nibel.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/a85920c7033de0273745adc694d243e4/nipeliguko.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/f7r391nsr6o9de2fj8hk0vmgre/65239088923.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/uhopo60b9fanonabfk39e53902/jowoz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=aeronautica+imperialis+rynn%27s+world+pdfPDF 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_off00013cbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CBC 18464 bytes
SHA-256: a4313546322c1827afbd438c7499df6692461279c68ef20a198b51fd47b889c4
font_01_sfnt_off00016cdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16CDF 11096 bytes
SHA-256: 6c4cbb91dfa113c2a04f1719956a6830f128529d5c0e5d52b96d8e81ebba4c35
font_02_sfnt_off000186db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x186DB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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