Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd38abbe3085168a…

MALICIOUS

PDF

89.4 KB Created: 2021-06-26 15:05:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1f8b7d4068d1d0b9f8f6f781f302dd53 SHA-1: 27cb05d47e2b9807cfb234d304eabe8b33d41652 SHA-256: bd38abbe3085168aa10928bdf582b107f5795f33f6cb38e6a9ff1df2b00aa52e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. The presence of external URIs and link farms indicates an attempt to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607ddfa645439---lemagupezinakurifupivu.pdf
    • http://jnnycc.org/userfiles/file/75568604328.pdf
    • https://aplusadvance.com/naver_editor/data/file/72519472469.pdf
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16082a32032c11---60986365255.pdf
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160bae227e7a53---sexumubejutaz.pdf
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a16380d3232---79113357388.pdf
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160840d801ddd6---67748588242.pdf
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16080300a3cc1c---8351983788.pdf
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/k1ht8lbh9j9vbc84sb7sukulc3/89082069255.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/ecdffe9e00ec34a300614d7ddf1949e3/napokamotenagakidugira.pdf
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160777fbaee66b---30539009262.pdf
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160aa288ab78f7---jizenijot.pdf
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa9f8150173---92507696652.pdf
    • http://x-site.by/upload/editor/files/58947921616.pdf
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/b6e75432259076b2ae32c0d02642bf5f/womexezonux.pdf
    • http://birzebbugastpetersfc.com/files/file/kupud.pdf
    • https://aldurra.ly/images-editeur/img/file/vavekekozuxev.pdf
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607a26c4f1cde---fudugazavubudejowi.pdf
    • http://tafgambiatours.com/userfiles/file/64218726235.pdf
    • https://cncostruzioni.com/userfiles/file/25099714122.pdf
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160af59ecd0689---68397134468.pdf
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/jrjhvrthsveg4mbe8ll3s1gcqm/39144330907.pdf
    • http://buddhavehicle.com/userfiles/file/jezepupinubi.pdf
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160727bbc7f7f1---1808127592.pdf
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8d073d33c---8441844128.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=who+has+keanu+reeves+dated
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcbb.bin
5e5f6d5c82e8918bd976f4f04e1fc158076eeab15d61da730b251e1d36095bf2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCBB 16956 bytes
font_01_sfnt_off0001289e.bin
c9e5297da11ec10b8c133284d23f3489e1309fa52d668c7f6a33ea8754a260f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1289E 10456 bytes
font_02_sfnt_off00014065.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14065 16792 bytes

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