Malicious PDF — malware analysis report

Static analysis result for SHA-256 65e9da0a67bc5a12…

MALICIOUS

PDF

86.4 KB Created: 2021-07-04 01:03:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 56284390caddcbaf30ef510b9cd2f916 SHA-1: 07f9065b5658916f6b5313b84c2c42fbc2d369ec SHA-256: 65e9da0a67bc5a1275d7187150d57cf0217f5ac64afa6deb5477adc73782c85a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting, likely intended to lure users to phishing pages or download further malware. The presence of external URI heuristics and link farm detection rules supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://garglob.ru/uplcv?utm_term=famous+actors+from+south+carolina
    • http://csc0898.com/userfiles/file/20210627013228_iis7go.pdf
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/160be135dcba55---24045898775.pdf
    • https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/eaedf1f59be23da41d502f414dc94a86/16781433631.pdf
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/1607f16a8eba36---nuxoma.pdf
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fa979288a5---5526301018.pdf
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1607c94046a33d---73347450792.pdf
    • http://adamlegal.com/userfiles/file/riwoze.pdf
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/e56a57d1ffea94fe825db639eba9f199/20349306281.pdf
    • http://studiotecnicodavico.eu/userfiles/files/91613365225.pdf
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/u5i3is3vvmf3bci8d5lbk7qkh0/20187225308.pdf
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3a26a0dbb9---36475787528.pdf
    • http://lamgi.pl/ckfinder/userfiles/files/lunivovugaropekatadosara.pdf
    • http://jshtextile.com/UserFiles/file///68163726556.pdf
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/775b52280dea33a24a12b8eae69665d2/wuwarekinotekeziju.pdf
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c5409e4915f---ropujivar.pdf
    • http://thomas-reunion.com/clients/8/86/86f5f051d314e00f57792b8428d7085d/File/dugusozizerimadadimu.pdf
    • http://musicupclose.com/clients/f/f7/f7c291dfb329fbc33054893077acf627/File/jonewo.pdf
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1608a4551e51db---65097155360.pdf
    • http://montaze.org/democms/userfiles/file/suzud.pdf
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a839ad37fca---sijememapepodoj.pdf
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/901b4feef5dbf2db2bc2a47c5a379a8a/35683905727.pdf
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cd0ee15dd3---36317908466.pdf
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/02c43e09a91d155ed55ca66b6563b42a/66546520719.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efa4.bin
7bc91c5096074560c0b573591fd2345b2d506845da10d1694d5aa64d7365a2f9
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA4 17060 bytes
font_01_sfnt_off00011c49.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C49 16792 bytes
font_02_sfnt_off00013460.bin
9fe8aa46c224c60e4a653ba733c27879035ba7fd84b28a05da8fe55c063a1f95
pdf-font-stream PDF embedded font (sfnt) at offset 0x13460 10548 bytes