Malicious PDF — malware analysis report

Static analysis result for SHA-256 040a2808e43029fa…

MALICIOUS

PDF

80.7 KB Created: 2021-06-29 01:00:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ac338ce2b8d3c9aafb5e337da8b4beb5 SHA-1: 975fa8302f9cf12a5865ddd9f422960eca38de60 SHA-256: 040a2808e43029fa7f2892c9f854a17ead43b38df9ced8d2ae6e6037b8e713bd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It functions as a link farm, containing numerous embedded URLs that point to compromised websites. The primary purpose appears to be directing users to potentially malicious content hosted on these sites, consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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 https://allytemp.ru/uplcv?utm_term=things+that+make+you+go+mm
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/22871d51c895f747092905e7ff627409/nazikatigitokizuxux.pdf
    • http://www.ortodonciaelisafarache.com/ckfinder/userfiles/files/nenuw.pdf
    • http://freeski.hu/freeski/file/funozivegune.pdf
    • https://marljivo.hr/UserFiles/files/40264520625.pdf
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/160b7d79e55f8b---dulovomewezepoxabago.pdf
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b8aac28405a---konaxowizefesatajasatufu.pdf
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/0o4q48rielod7lkcnku6juhhg0/jakulijofoteronevuwu.pdf
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b3046579ea4---zudubarixazo.pdf
    • https://misionesmedellin2030.com/wp-content/plugins/super-forms/uploads/php/files/burmd0roglq6am4dijjs7nio4u/59579284943.pdf
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607fade6517e8---47371660774.pdf
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca084b70b5---32805431635.pdf
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160790946560a4---lafemipegewuvirunosibu.pdf
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/160cd05654b8e1---79089188789.pdf
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/83ca32533d5de1f54aa3320c62f22689/xapenokejefemajusubobim.pdf
    • http://usaoxin.com/userfiles/2021-5/file/tofirinaba.pdf
    • http://bettynblue.com/upload/fck_img/20210524/file/kudusevewibukebat.pdf
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/0t6q2df4ok2e1urtqe5dl4dt96/lizotopekotu.pdf
    • http://moreit.ch/productinfo/file/31574214465.pdf
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/04175943394a9cb807374df34c73118c/nebosemozifoletofijenawon.pdf
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/dbd89d056ea88280d0634db709308968/87252339224.pdf
    • http://agcslohian.com/userfiles/file/10628749693.pdf
    • https://bouveau-consulting.com/userfiles/file/vutefokafodezo.pdf
    • http://edwardlankin.com/clients/86087/File/gasavu.pdf
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/be4dac5aaf9d40d291458d1a93a0af9d/nurigizoxamorizor.pdf
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/q9tcv36mncs0q915ga6re872jn/juzakukatudobowumenodel.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_off0000da6a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDA6A 16792 bytes
font_01_sfnt_off0000f281.bin
45986a8f7846112040856ac6b64444bf3b307628dbb9d37e9ba4d40244cbdbe4
pdf-font-stream PDF embedded font (sfnt) at offset 0xF281 10680 bytes
font_02_sfnt_off00010add.bin
b64933c4c1d6c888355c5008b270fe7b05d088186b52a5a1ca2d7be9a21ab51f
pdf-font-stream PDF embedded font (sfnt) at offset 0x10ADD 16456 bytes