Malicious PDF — malware analysis report

Static analysis result for SHA-256 9149beeae200f85c…

MALICIOUS

PDF

93.4 KB Created: 2021-09-10 01:17:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d1c682a41404087d333b0b2edf1095cc SHA-1: b277cd3c7b1607781332b8dcf52c31320cfa6301 SHA-256: 9149beeae200f85c6031ddd4e93b5542c9bc21ee1f70346055433b318af6e793
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, with heuristics indicating it functions as a link farm pointing to potentially compromised websites. The presence of embedded URLs and the nature of the heuristics suggest an attempt to direct users to malicious content, likely for phishing or malware delivery. No scripts were extracted from this sample, limiting the ability to determine specific execution chains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://unewstoday.com/task/userimages/file/76774261610.pdf In PDF document text
    • https://www.naabelectric.com/userfiles/files/72862391908.pdfIn PDF document text
    • http://cancunday.com/travela/img/files/94911633975.pdfIn PDF document text
    • http://anthonyvienna.com/sites/default/files/file/76300776110.pdfIn PDF document text
    • http://p-itos.net/admin/userfile/image/file/sidibimegi.pdfIn PDF document text
    • http://sjanzee.nl/file/90339874560.pdfIn PDF document text
    • http://holzbau-napetschnig.at/58594138382.pdfIn PDF document text
    • http://standdominica.org/files/files/teguzijukemitipesarebut.pdfIn PDF document text
    • https://franchiseharbor.com/files/files/zubuleluwat.pdfIn PDF document text
    • https://fairtradeportal.pl/userfiles/file/35168729733.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132c27c863b8---mizutuninusipiriwitiv.pdfIn PDF document text
    • https://patriciobanados.cl/upload/file/In PDF document text
    • http://market-oborudovanie.ru/upload/file/18971009027.pdfIn PDF document text
    • http://senesi-sklad.cz/userfiles/file/98561847498.pdfIn PDF document text
    • http://heninrealty.com/userfiles/files/58721346849.pdfIn PDF document text
    • http://thaihotelsale.com/FileData/ckfinder/files/20210908_4B700ADEB517116F.pdfIn PDF document text
    • https://goez3.com/10005001208290177/ckfinder/userfiles/files/85201327508.pdfIn PDF document text
    • http://xn--9n2bn9mz3aba29g44r4o0a.kr/fckeditor/userfiles/image/70595923704.pdfIn PDF document text
    • https://www.prshots.com/ckfinder/userfiles/files/98498499106.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613a8143af784---74802843635.pdfIn PDF document text
    • https://dolnoslaskialarmsmogowy.pl/imgturysta/files/bisebazixisirixivanedo.pdfIn PDF document text
    • https://korzo-galeria.hu/files/file/61876458182.pdfIn PDF document text
    • https://macroedunet.com/userfiles/file/domaf.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1613097daec389---74272718758.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=jak+skopiowa%C4%87+kontakty+z+android+na+iphonePDF 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_off000105de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105DE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011df0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DF0 18400 bytes
SHA-256: 79505b01a93ebd4d1a98d486c425b2b69ea499ed6c4521d02311dbd21717bc7f
font_02_sfnt_off00014c6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C6A 10924 bytes
SHA-256: a16f0eaef96a7c9b66270113475b27ff4a06fa98588a4a77cabf5fab922b11b8

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