Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b36535e41d2a189…

MALICIOUS

PDF

91.5 KB Created: 2021-07-04 05:30:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9432d0f6207e8a42332c5af72d606c85 SHA-1: 5773c15d211867ad80f25684fb62c7ea2e89f2c6 SHA-256: 9b36535e41d2a189cb4d331bd170f2453ab4238d341d5a79d4c0b444f70629c1
164 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, indicating it likely contains malicious content. It functions as a link farm, with numerous embedded URLs pointing to various websites, including those hosted on compromised CMS uploads and disposable domains. The presence of 'utm_term' parameters suggests an attempt to track user interactions, common in phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9850

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://huntic.ru/uplcv?utm_term=snaptube+to+mp3
    • http://efuturesthai.com/uploads/file/46895211221.pdf
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c9b8a2952e2---moradivijubuxukarasudomu.pdf
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a32ebec99c2---zolezafiwajikikexak.pdf
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c912b1b408c---domorowatubirodokisepeder.pdf
    • http://xn--9p4b29dncp2cc6y.net/upload/fckeditor/file/fuxixekazawuji.pdf
    • https://fzclicks.com/demo/files/editor/file/70801072595.pdf
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/o99dmgvlquumhuko00agf82k0h/69883979379.pdf
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/f879817c549c32d299005c3df53f401b/60551294763.pdf
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160965df098a52---86863848092.pdf
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609a0d5b089d3---63677859169.pdf
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/16093b59912807---98784352346.pdf
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607912a6e60fd---worumajodemoperufuzu.pdf
    • http://vmkmsz.hu/userfiles/file/pajojifikadow.pdf
    • https://ebooksweb.net/files/file/6216347878.pdf
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1607a4e63e2c53---31398530058.pdf
    • http://evergladesharvesting.com/ckfinder/userfiles/files/88664845134.pdf
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607497e9f305f---sirojovakewuxafakaxo.pdf
    • http://brenno-tojestto.pl/userfiles/file/34512438200.pdf
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160af9caa6adb7---tigoruzagijolisejenexe.pdf
    • http://bangkoksolarpower.com/syner_upload/images/files/womopoxadu.pdf
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160941f5a11b82---gasonuk.pdf
    • http://myjacksonfamilyreunion.com/clients/e/e2/e2167ce47089e9b789d53270b7cccc99/File/97192782293.pdf
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac1464177e6---63469697532.pdf
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/peasfe08r1ep71n32asims9et1/92369568862.pdf
    • http://anandamsanyal.com/userfiles/file/najusu.pdf
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfd2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD2 16792 bytes
font_01_sfnt_off0000f7e4.bin
50d3ddf06acd802c886b762b76001d69a46291cbe8606126089f7ba1db39b2d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E4 19796 bytes
font_02_sfnt_off00012b35.bin
fd494554c7a7a2c4488382a78096c535ff133766c7221992be4f6a58596b2467		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B35 16164 bytes
font_03_sfnt_off000140ac.bin
758d71958cc38e543284fa7fe529f08c914ecf122ebb64e64738f5cf931f8f10		 pdf-font-stream PDF embedded font (sfnt) at offset 0x140AC 10492 bytes
font_04_sfnt_off0001584f.bin
3f1748778f03e7b7e2d3a6c88ca15ef060a02f224cd71155e662fde9dd4c56c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1584F 1672 bytes

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