Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4e19aff0a450f9e…

MALICIOUS

PDF

107.3 KB Created: 2021-06-26 03:05:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 249fa5c5b1f871703e1e214626a131ba SHA-1: 8a3749f500a19bad23d42959e5a49c09d1fef0ba SHA-256: a4e19aff0a450f9e9e75ce8c88b903b5b3f05a3042cc53ef050a7f7d1e842789
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate an attempt to lure users to external sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9933

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://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/4ceaf0a7e17b446fc8800b2bb583ae65/86462548206.pdf
    • http://absolutelyneon.com/userfiles/file/kilowofopixarupefadaraxe.pdf
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/130c82c4d1f6a9e228ceef3bc485ba13/56890512691.pdf
    • http://sotel-perm.ru/site/file/75875047893.pdf
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/102a32c89c2cc6f0e81b3867df6d1f23/zuden.pdf
    • https://purefeeling8.com/data/file/6625511541.pdf
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/a1beb542fa79a118bfd96d4c9323335d/46188785316.pdf
    • https://abugfreemind.com/userfiles/file/97942515897.pdf
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/2cecf306fe3b5c7216f0f9cf069b8d80/muwubud.pdf
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/qd5qm9qn69jhpqaiqr6stbsn99/fejafofazanefajibaj.pdf
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/lu52mu7c682kbfk3jdie8rr1q2/rabujokofetezeloxe.pdf
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/f513dbe825efd4a7f689d9e5983b5185/38842191862.pdf
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/btdgvukhjrurdet50t58ovd7j1/70272448153.pdf
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d8ccd43c10---nosefixevu.pdf
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/laq52vt8lc1l5ei19q6i64f9ck/nalanozobumuzeji.pdf
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bac24d8495---48476260338.pdf
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8565e73da5---74467873423.pdf
    • https://embassyinvietnam.com/webroot/img/files/fikekotokubunalito.pdf
    • http://boathousebrokerage.com/userfiles/file/25420021753.pdf
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609099c14c273---pelew.pdf
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/026db5419ac687bc19b92560caf558b5/jawutaxugamuvido.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=handbook+of+technical+writing+10th+edition+pdf
    • 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_off0001197b.bin
3304e9b822f5be20a2e915e5de40fd4cbdd0d4aac3bdd9393564567b4890294b
pdf-font-stream PDF embedded font (sfnt) at offset 0x1197B 17772 bytes
font_01_sfnt_off00014819.bin
8bab91126d5cb971246c141748b24dff72f2021a183649656dce888a4ac79d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x14819 11216 bytes
font_02_sfnt_off000161de.bin
bbe8adb7abc382c2558c58af47152fe3d98c5a2a21741db8a97523408df2101a
pdf-font-stream PDF embedded font (sfnt) at offset 0x161DE 21784 bytes
font_03_sfnt_off0001871c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1871C 16792 bytes