Malicious PDF — malware analysis report

Static analysis result for SHA-256 27b0b2a6d858da30…

MALICIOUS

PDF

98.1 KB Created: 2021-06-25 18:53:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0d79f5f7cc179f763fe86fbd3613e408 SHA-1: 92dfd30515e7409fb1ce10e6d9145f38ee1f8357 SHA-256: 27b0b2a6d858da3084c365fa060c5317afda705bd078ee8758fca10ce87cc91f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged as malicious by a machine learning classifier and ClamAV. It contains numerous links, many pointing to compromised WordPress sites, suggesting it functions as a link farm. The primary purpose appears to be directing users to potentially malicious content or phishing sites, leveraging a link farm technique to obscure the ultimate destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9895

Heuristics 6

  • 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.
  • 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://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/a5lqhdgbrhl62npfti3gup83j7/pujen.pdf
    • https://arte-salon.ru/upload_picture/kawerokadululemovami.pdf
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/a0c8e94b589232ca03474c058e20b0cc/18122105768.pdf
    • https://takeorders.online/wp-content/plugins/super-forms/uploads/php/files/volee5fh7ja5oueom078in7pat/73172229601.pdf
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071695b9d397---83115768677.pdf
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/0249ad896b442cedaf6f39df3fca20d3/65150104430.pdf
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084c3c54cb7b---33899534929.pdf
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/16086e75015bd8---doziteva.pdf
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/sp0cuot9jlgnag1l51g3ot8ouk/paronubifosawuminomi.pdf
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160758ecca5e8f---dejukejepari.pdf
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/780d4563068abd97968ff08950afbbf6/20006983715.pdf
    • http://canphantich.net/Images_upload/files/bajonubigazevulu.pdf
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/1ujcr6nrnnbhvls56v7oq0vdd2/74857232959.pdf
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160755da658bc0---nuziwufa.pdf
    • https://actor-conseil.com/files/file/96155643935.pdf
    • http://nowyhotelik.pl/userfiles/file/savesekizivemogekexux.pdf
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c174290f50d---73413442225.pdf
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c0d2eb7757---budag.pdf
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16071c9ee76121---xafufavuzutuvakadejiru.pdf
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c163aa7fb17---lakuxusoxe.pdf
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607a30b3d0f09---boxijakuf.pdf
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/7a797a7fcb4e453264823206de033b18/38220836601.pdf
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16071624c8ccb0---8535927842.pdf
    • https://baxsporthorses.com/userfiles/file/31594789162.pdf
    • http://alaskacounseling.org/clients/8/87/870ae3779d21e956d596131c1dd113ff/File/sejubewepovosegupuke.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=seven+deadly+sins+movies+in+order
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010701.bin
e721ab6d90053b72db505cc2f41d29db4511bdf074ff30d85387320e486cb617		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10701 17460 bytes
font_01_sfnt_off0001348e.bin
fd494554c7a7a2c4488382a78096c535ff133766c7221992be4f6a58596b2467		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1348E 16164 bytes
font_02_sfnt_off00014a05.bin
adef1ab0857fcb0fce004789e1a056131a3db356408cd02596296f5d5cce7fa5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14A05 10564 bytes
font_03_sfnt_off0001621c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1621C 16792 bytes

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