Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c02e9b99e760292…

MALICIOUS

PDF

111.6 KB Created: 2021-07-01 09:33:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3fd1cf1ff5cb81a253cc5bb053bb504d SHA-1: e5cd11aaaefe32d5aecb45f18ce4eae894f2c2dd SHA-256: 6c02e9b99e760292241ca9bf990453c148bb1fc1f61e345de6411f797618ae8f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file functions as a link farm, containing numerous external URIs pointing to compromised WordPress upload storage and other disposable hosting sites. These links are likely intended to redirect users to phishing pages or download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9698

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 https://oniceh.ru/uplcv?utm_term=inoperable+meaning+in+tamil
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/595149d1891bf7a7fbdad8cd4ff359af/86503470661.pdf
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160840f8e72e30---sogajejalekuvigor.pdf
    • http://grappin-annat-como.com/userfiles/grappin-annat-como.com/file/12396995364.pdf
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc0dc3d90c---96123507103.pdf
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/04173cf8f8d8950745a9ddcb5d5a926a/kumadafeguma.pdf
    • http://ingenermarket.ru/userfiles/63183293562.pdf
    • http://womensmentalhealthmd.com/clients/9/9a/9a9ccad1be43d50cbc9928f06550b956/File/jutaziru.pdf
    • http://quanhoangtsi.com/upload/quangtri/files/25732835370.pdf
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/d088badd8332275c48e6583d82ee4f45/navujamizipawekovamak.pdf
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077ab1e983f9---salupubazobedudonipos.pdf
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/d7343af17631c568204b92259a5b680b/97333347377.pdf
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/499e6e201415992601e0ae433848d379/49704487907.pdf
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/8d663c2650a93c653b9c306c314e3db7/nisowavamavepi.pdf
    • https://dolaodong.com/userfiles/file/9980196211.pdf
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e4894eb999---72639180266.pdf
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/6utds75vku1fttdk7t5fd0bk8a/4665488908.pdf
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/0114b6c69264235ebad092ba5e2ea8a5/41177229867.pdf
    • http://aaaexpressac.com/userfiles/file/xunasuvidomuf.pdf
    • https://gregor-biffiger.ch/userfiles/file/89722908419.pdf
    • http://aal.tw/uploads/htmlupload/files/zexitinuludaraj.pdf
    • http://winso.tw/userfiles/file/62025341780.pdf
    • http://posekatzahradu.cz/files/file/larabamuf.pdf
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ebaf95974e---limoxupemu.pdf
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/4c3977867240d4ebe04a45cdf3f92c57/56847613292.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
stream_004_off00014819.bin
d9f5e66163d907df9b2c2f031b8906ab183602eda4757f3e8ef428a9cf922d60		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x14819 18328 bytes
font_00_sfnt_off00011867.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11867 16792 bytes
font_01_sfnt_off0001307e.bin
97cc4209b973df2b41359b9d1022f043163f86b488e077e1097f69341765fc30		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1307E 10516 bytes
font_03_sfnt_off000165b1.bin
a8161c2f5ba9235eb51b4fcc43b6bb219725019365cb8d38f9ec25dfe5ce54ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x165B1 3464 bytes
font_04_sfnt_off0001732c.bin
f730ccbab1aeb813c673c353cef0af3a7f35d4ce3ff8b8e5fa735c1250ad481d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1732C 24168 bytes

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