Malicious PDF — malware analysis report

Static analysis result for SHA-256 323acc31a1ec69b7…

MALICIOUS

PDF

81.6 KB Created: 2021-09-03 01:20:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 32cb6ecc038f073b6b6e90d15e7789c7 SHA-1: 60f81b7cc5da3c07ff6867cdd2a06baefe054df6 SHA-256: 323acc31a1ec69b7d8014a9b1f2228211f70b74b66de44480aea5df72d6a1597
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with many embedded URLs pointing to various websites, including those hosted on compromised CMS platforms. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://garmagostaran.com/Upload/file/18510331448.pdf
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16105c7c7a9b8c---garajosa.pdf
    • http://namlinhchisapa.com/userfiles/image/file/83903995367.pdf
    • https://atx-stroy.ru/wp-content/plugins/super-forms/uploads/php/files/a45e47decab460a22bce5c09c2f2f498/86942122205.pdf
    • http://keitbg.com/images/files/dasovumudegapeja.pdf
    • https://prosaison.fr/userfiles/files/18667826155.pdf
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f01f3f2b48e---ribenagonubesanebig.pdf
    • http://vasvaripalmuzeum.hu/upload/file/15400808575.pdf
    • http://candybeauty.vn/upload/files/97448407148.pdf
    • http://angelojrobles.com/admin_initial_test/userfiles/file/24843674692.pdf
    • http://szsahsh.com/uploads/files/87805722187.pdf
    • http://www.atccs3.it/atccs3/fckeditor/editor/ckfinder/userfiles/files/49201890386.pdf
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1607ece4905030---86855734407.pdf
    • https://www.alugutader.fr/ckfinder/userfiles/files/92453584153.pdf
    • http://www.predia.cz/userfiles/file/52343345147.pdf
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/ba3ac74591eb26b8cc0400c88fa16253/23254562585.pdf
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c9505db7a6---tarozudumoku.pdf
    • https://chambredhotes-savoie.com/ckfinder/userfiles/files/kekeb.pdf
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/1f4188020407d97884e940b6732bfd23/jeponezolisasakofotof.pdf
    • http://www.kickcommerce.com/userfiles/file/44445514533.pdf
    • http://phyllisrubensteinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/89692111780.pdf
    • http://cathugo-catamarans.de/res/wysiwyg/file/muwidojoru.pdf
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160cdbf12a91fd---89262874819.pdf
    • http://oshcongregation.com/userfiles/file/19300732882.pdf
    • http://seanbittinger.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/35324253905.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=quotation+marks+punctuation+worksheets
    • 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_off0000d9b0.bin
1ec8b74128686da263e54d8a1007933810aea5e85cde3f711fb2871736431517
pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B0 17848 bytes
font_01_sfnt_off00010756.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10756 16792 bytes
font_02_sfnt_off00011f6d.bin
b4ed1042db8c563655cfb2e78a87af700516deb6477d567332e5ffe8794a2e0a
pdf-font-stream PDF embedded font (sfnt) at offset 0x11F6D 10932 bytes