Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c0a5dd41d0e6e62…

MALICIOUS

PDF

91.7 KB Created: 2021-09-06 18:21:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 5274c0a1c634f7256acec7ae8e69eba7 SHA-1: 7e5301b1dfe0aa396e80ce6603299d5da3a93d76 SHA-256: 6c0a5dd41d0e6e624be5949d7afc61b13db8bc52b86f8046dca9df8a05ba0651
156 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The embedded URL, while marked benign, is part of a larger pattern of malicious redirection attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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 http://ccshecea.org/upload/files/banesujadele.pdf In PDF document text
    • http://staceyasp.com/UserFiles/file/38114087169.pdfIn PDF document text
    • https://nezrenpin.com/calisma2/files/uploads/24421245212.pdfIn PDF document text
    • http://sportsclinicwest.ie/media/contents/file/31976855266.pdfIn PDF document text
    • http://resortcrimea.com/ckfinder/userfiles/files/kotivuxetategeperurir.pdfIn PDF document text
    • https://beruanglucu.com/contents//files/99635200951.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/28qarui22kj3pclnt9kar2thb2/fowomulozirenodewuruteta.pdfIn PDF document text
    • http://presssimayeshahr.ir/pic/file/nokavolak.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609f980a415ea---nigewudovedokunolided.pdfIn PDF document text
    • https://worldcastlive.com/userfiles/file/66460365750.pdfIn PDF document text
    • http://poltinik.ru/userfiles/file/gapuba.pdfIn PDF document text
    • http://perles-del-beya.com/userfiles/file/vozaguv.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/file/34709188968.pdfIn PDF document text
    • http://3dsami.org/uploadfilefiles/43327561429.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/89deb960e1aada355c4975ec61273d87/gilorewadagi.pdfIn PDF document text
    • http://siembra.me/uploads/files/mugepomidutawijewipova.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/m205rdphibucunfk6gf16nc3vf/bimexotiked.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/e54a135a55ff83ac93a42b53082dbe36/vofuvisejuvax.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c12f6e5d84d---13534502267.pdfIn PDF document text
    • http://candybeauty.vn/upload/files/51836321177.pdfIn PDF document text
    • https://global-product.org/CKEdit/upload/files/pokofamixebadukizuxanirud.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/173050e123468f9961507cf9e90dc8f8/70745734009.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/1af506ae4e4e51301cbc79c85d87a072/75463651621.pdfIn PDF document text
    • http://allg-gyn.ch/userfiles/file/webopowesolanuki.pdfIn PDF document text
    • https://infotechb2blite.com/bot/ckfinder/uf/files/80695803941.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2b9b25c877---gogomuxesafeziparijanen.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=wharfedale+pro+connect+502+usb+manualPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC3F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011451.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11451 19032 bytes
SHA-256: 07eb8b78db83af45f4572706fa9e150725239afa83537905ae20318204cd5d05
font_02_sfnt_off0001463b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1463B 11404 bytes
SHA-256: 0b95fbeb0f464abb9c7022cbff3356c9c4dc8de8389679854693e37cf1c29f69

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