Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f95cfac83cdd3e1…

MALICIOUS

PDF

112.6 KB Created: 2021-06-26 22:58:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a1ab3cc05860481a05d2d44e3c5aa2ec SHA-1: 3fd3e62ca658bd05e695eb98b29c60f26654e5d4 SHA-256: 2f95cfac83cdd3e109ace14af5d9441f55aab67c1490e7ed5da5f86e12223507
156 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to compromised WordPress sites. These links are likely intended to lure users into downloading further malicious content or visiting phishing pages. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9794

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072466e56ce7---xofizuvofawufagepekoto.pdf
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/vdf8kqkaiocj4c4b73usdcd0n1/8812277629.pdf
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac05ff71fc1---mamexopubamexure.pdf
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/179f258c1614240c497caaf120acb06b/60733540148.pdf
    • http://lycee-elm.org/userfiles/file/butixukeluzafolanimoledo.pdf
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16076057995730---zuvaxogedozuwad.pdf
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16076a2bb6d425---38746855964.pdf
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/ff669c473e00e616a2da4f61fa756520/63128375814.pdf
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/d4a82cd83cca860645c2253491112542/nikevazenisexoxov.pdf
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/160817e77de0cc---rosusejasukapunubidarov.pdf
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bb61f02aafa---59840967535.pdf
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/hgb88kqletb12m157tgkfo8pt7/48263073448.pdf
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609d95e129e42---2115580444.pdf
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/ul0gprhl1krvlr9v3b4rql8i3j/14310169939.pdf
    • http://csc010.com/userfiles/file/20210606181306_e4lx2r.pdf
    • http://meble-tk.pl/userfiles/file/88679727877.pdf
    • https://colakcivi.com/userfiles/file/33200802852.pdf
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/bfdad4e0db96f1d98ebeb1e1941f4a5d/nipubuzozelefosodezeke.pdf
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608cc4f5a45b9---3125565960.pdf
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/c9esjn6kqth5sen094hemj31n7/bajomixevepe.pdf
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/ec409112220e6d1073319215a38099fc/4225148404.pdf
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/16075b52799419---6966898447.pdf
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/nlebcm8v74tdjiqloijukh0lit/vegodixukifow.pdf
    • http://schokozentrale.de/idata/pijezofotiwufexiko.pdf
    • http://aiswaryamatrimonials.com/fck_uploads/file/tikerurojegirexu.pdf
    • http://greece-ex.com/images/blog//file/47741777215.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=porn+games+latest
    • 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_off00015486.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x15486 16792 bytes
font_01_sfnt_off00016c98.bin
7a714682ed5ca082128869d2d39995efc4ae8c2356da1d6b111e73ed29dd39a3
pdf-font-stream PDF embedded font (sfnt) at offset 0x16C98 18116 bytes
font_02_sfnt_off00019c43.bin
7914617df982e5047672a2ef1ed672ce284f64dfc4d73c171426ae909261185e
pdf-font-stream PDF embedded font (sfnt) at offset 0x19C43 10360 bytes