Malicious PDF — malware analysis report

Static analysis result for SHA-256 24f63110fbbcf346…

MALICIOUS

PDF

95.7 KB Created: 2021-06-26 20:46:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4f21bdddd1099c38ae01e41e663f526d SHA-1: adf6be4189bc295a6aed3d0edc9a5c07fff5674c SHA-256: 24f63110fbbcf3468c6ef338e08a37f57d5dbf8e098d8a65bd2d430d01d8f13a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm pointing to numerous external PDF files, some hosted on potentially compromised CMS uploads. While no executable scripts were extracted, the structure and URL patterns suggest a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9786

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 http://anthonyvienna.com/sites/default/files/file/wejeg.pdf
    • http://infrabud.eu/fckpliki/file/josogekixo.pdf
    • http://alexhoffordphotography.com/temp/files/file/wezikisusasibevetonorib.pdf
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076b7cea6af4---lilipalasizabutenema.pdf
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/0d1635d45de8989637931cbffb5f150a/15130977003.pdf
    • https://menu2uplus.com/images/file/484317434.pdf
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/16086a15073737---palavawupima.pdf
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/16086dc1437e95---58631492612.pdf
    • http://asianaccounting.com/admin/fckeditor/userfiles/file/93129351991.pdf
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3c38daab0d---vorutimabejetodiseragak.pdf
    • http://stellar-toys.com/ckfinder/userfiles/files/88570379919.pdf
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093f8884831a---ridudeje.pdf
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/3066db56acbbab73a76eedf07bc61f40/pujisozasuta.pdf
    • http://bularz-auto.pl/images/userfiles/file/rusowenodug.pdf
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afd3dfeb1c4---bogumetapufigegosif.pdf
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/f1c4643bc2d3ee474e5ad80187a7da27/56115378559.pdf
    • http://chapmanhighschoolclassof1968.com/clients/c/cb/cb1fed5110c07f199f416a264ee6943c/File/78727628108.pdf
    • http://aldo-ins.com/userfiles/file/sudifaf.pdf
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077b1a7df640---40196027505.pdf
    • https://transpack-krumbach.de/_upload_bilder/_filemanager/file/42589491913.pdf
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/90b5bd5f01d6ce74f28cd1ca13b5a0a2/66666917696.pdf
    • https://www.propertyadvisersaustralia.com/wp-content/plugins/super-forms/uploads/php/files/d73f7fabb20cf900b38d9aff1fc86f73/sudamiranal.pdf
    • http://walkercombsfamilyreunion.com/clients/d/df/dfd517ab040340b2551da60fba195f5f/File/46910105818.pdf
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c302bd75764---70429670268.pdf
    • http://niestachow.pl/data/aktualnosci_imgs/file/39691709418.pdf
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/1aab66b7b966f69ece25c73e58280978/dewapo.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=the+grooming+shop
    • 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_off0000fa86.bin
0e4cde3d5bdd5452960de995a4807c8da4ec665155a9812e2f8e54e6c49b7878		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA86 16448 bytes
font_01_sfnt_off00011160.bin
9e98a8256b2be13c9fd9d6bcd7b1a53f6cabcc65fae46f0ecf1f9b7880df27c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11160 10356 bytes
font_02_sfnt_off00012884.bin
221ee90e325cee53eba399115195981423c4a21718ded28bc1cd2742e85adffb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12884 18272 bytes
font_03_sfnt_off000157a5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x157A5 16792 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.