Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc8dd9d92e3ab9cd…

MALICIOUS

PDF

80.4 KB Created: 2021-07-19 00:32:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 0012bcee97a583b9d915335f1652375f SHA-1: aa0c6cddedc8cc108c5735cf8f6a8dec2cc1260c SHA-256: cc8dd9d92e3ab9cdcdb555ed45565594281a9116e18a6c17248eb7bfa1819c33
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics, including a critical ClamAV detection for Pdf.Phishing.Trojan. The document's structure and embedded URLs suggest it is part of a link farm designed to redirect users to malicious content, likely for phishing or scam purposes. The 'SE_CALLBACK_LURE' heuristic specifically indicates a pattern consistent with callback phishing or tech-support scams, aiming to trick users into calling a fraudulent number.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://wsp.pl/userfiles/file/61063209561.pdf In PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/40b8ab8318b462c24b8beb7621184998/jokusepafunijozuxonadake.pdfIn PDF document text
    • http://xn--42-6kcdlkbomh7beggito5p.xn--p1ai/userfiles/file/suzap.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/b1d856345ea21ca96539b03e8cec03cc/nuxododekatoni.pdfIn PDF document text
    • http://naturalmis.com/userfiles/file/17975103598.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/f72463e1053c98df0721ddadfee8a988/47228958108.pdfIn PDF document text
    • https://12shio1.com/contents//files/74573432640.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/78835099466.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c3a0713b457---wugafumo.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ee516e5dae---97962609292.pdfIn PDF document text
    • http://biurod9.pl/public/userfiles/file/vigatamoberowituxinusu.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608426fcdab54---zejedegodegivamulinaz.pdfIn PDF document text
    • http://thebrownbag.vn/upload/files/zizosodofup.pdfIn PDF document text
    • http://ei-windykacja.pl/upload/file/kotekuripuwifivuziwudin.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160d670264f856---luvukezapazi.pdfIn PDF document text
    • http://www.alexgis.com/siteuploads/editorimg/file/tonokokejatadopitoxok.pdfIn PDF document text
    • http://pro-elec.ru/ckfinder/userfiles/files/5160963258.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/943f8ca1b12bf5c4a0fd428697907658/fowewamaponoreg.pdfIn PDF document text
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/u74g0nh1qm5upue5sm8kr5r6ju/zamolimorisipisalugog.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160920e872ca0f---1721170426.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0fe2c626ef---wonide.pdfIn PDF document text
    • http://samnakthodrahassob.com/userfiles/file/riruroxubixo.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/5b4483868bb5120c30cad5e522722985/lubogaparutageb.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=3rd+party+dmv+near+me+open+nowPDF 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_off0000d7c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7C0 16964 bytes
SHA-256: 0d7566b15ee81c66cb90545bee890fa150e5b55d1f338caec37c5780d332696f
font_01_sfnt_off0001043f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1043F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011c56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C56 10588 bytes
SHA-256: d9c8edf1884ed3da75a6fb2dcbab2bb26b2fa06dd08fcc5ed42c04520c449a34

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