Malicious PDF — malware analysis report

Static analysis result for SHA-256 116f5e059ef61c98…

MALICIOUS

PDF

89.6 KB Created: 2021-07-14 07:00:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 65cfb6af3e5be2a844c3de1049d53f42 SHA-1: 783581fff753390171ca33ca5727678be6bacf18 SHA-256: 116f5e059ef61c98895e508d97416fc8ad6c75e9f0d9fe16b8f03e3e6fd416b1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories, indicating a link farm designed to host or redirect to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the presence of external URIs and compromised hosting points to a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/55ddd6e0454c273c2eb4a48bcaeb2a28/24219727959.pdf
    • https://gencerenerji.com/resimler/files/72531466233.pdf
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca45bb5665---rejerolelukopiwitixulati.pdf
    • http://zabradli-znerezu.cz/userfiles/file/roxafizunakuwero.pdf
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/8e33d6d4e95cf56058dab4b5aca791f2/rijukegejadux.pdf
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce15fa7e5b---kewudupi.pdf
    • http://clair-environnement.eu/catalogue_dynamique/file/guzowefozuzet.pdf
    • http://dush-kz.ru/uploads/fck/file/fiwupo.pdf
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/e864cdb37a22e5cffe16d00ea192f0e6/41517448615.pdf
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c148eee7676---5239323505.pdf
    • https://bluetact.com/locktactyuma/userfiles/file/24357636384.pdf
    • http://vipnjl.com/userfiles/files/taroresetizurexif.pdf
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a392871e2ea---newikodu.pdf
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8756bf389a---tazovutasirifiv.pdf
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/64b680f4a27dbdd1f849cf48dd2be97f/35458041875.pdf
    • http://domholidays.com/userfiles/file/1816044269.pdf
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d4b6187f3b---98237239748.pdf
    • http://happysmilecard.com/uploads/files/kaluf.pdf
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/e137ace78384576eed5730fda716a14e/84503304648.pdf
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/uup1e6but7ggat79t0nasikco4/morugakevotudifofejef.pdf
    • http://fapannimario.it/userfiles/files/88921566845.pdf
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce9fc1041ae---28222452462.pdf
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/b05c3549f15f8845fb2a0eb1d1d542c3/dalolobu.pdf
    • http://hrdiborice.cz/erucom1/files/files/26911210448.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=choose+the+correct+singular+third+person+conjugation+of+the+verb+to+be+in+the+future+perfect+tense
    • 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_off0000f548.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF548 16792 bytes
font_01_sfnt_off00010d5a.bin
e76142008093ab52f16f1f2a37cd054df4523903b4bd1d5eb96ff48d5b817e2d
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D5A 19004 bytes
font_02_sfnt_off00013d56.bin
5bb9669de79ec3a3759e2a780a79f9797c90dd3df3bb3d95081cf26f254f7374
pdf-font-stream PDF embedded font (sfnt) at offset 0x13D56 11368 bytes