Malicious PDF — malware analysis report

Static analysis result for SHA-256 20aa3666f8a15d9b…

MALICIOUS

PDF

92.5 KB Created: 2021-07-03 01:27:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b6b6623643eed72b1509ad43499c424e SHA-1: b26a3a0bd7c5aac11859e5d90abcb4efee74fd5f SHA-256: 20aa3666f8a15d9b467bb49416b2def3ad0566b9366a4aa7b1b98ed562f0c9e6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier, indicating a phishing or malware distribution attempt. It contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting an effort to redirect users to malicious content. The presence of external URIs and the overall structure strongly suggest this PDF is designed to exploit users by leading them to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 5

  • 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.
  • 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://queure.ru/uplcv?utm_term=how+to+make+a+secret+entrance+behind+a+painting+in+minecraft
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a2f5f10c024---zadomaximuzanasuxa.pdf
    • https://www.indoorclub-informa.com/boletines/img/file/ferolori.pdf
    • http://provia-events.de/pics/fotos/1/file/63064566843.pdf
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/c8d41a58090eb5e8abc3b614cfcfdf40/lajidixo.pdf
    • http://gomientrung.vn/uploads/image/files/58453984944.pdf
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609833108ab24---nowumexakogagudara.pdf
    • http://hccc252.ca/clients/e/e4/e484b38507f190a955b66748903449e1/File/xufovemujanojuzavukuzotot.pdf
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088892d586c1---musupudikofixodadomaxa.pdf
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/n0huekm8s0261h73r16i2ggpg6/26660444884.pdf
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a850ac132f---43703997064.pdf
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16081d777e79d1---31424857752.pdf
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/552a36000fad36dc9615f2d26170ed16/xekatibinidajenogema.pdf
    • http://stylekd.ru/files/43702918546.pdf
    • https://liniagdanskzydowo.pl/files/wuwiwiweruvigazubazunajo.pdf
    • http://yjccnc.com/upload/files/20734194892.pdf
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d02e2842b71---vemaxapirofemokilawaxibes.pdf
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/c7e2be8815afc3db58d49559de2bf582/bixepuvorexefovu.pdf
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/etvq1futvoqvmnh2ob9gp6if7b/90741218967.pdf
    • http://morard-mcf.fr/data/Files/vubixo.pdf
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609e20b127fbe---41893690804.pdf
    • https://seikico.net/img-tym/files/didegaxitibelasizivepavip.pdf
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a46f2fa1eab---52005482692.pdf
    • http://bachova-terapia.sk/images/file/88402040120.pdf
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160badb6781fd8---fapowaj.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_off0001007b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1007B 16792 bytes
font_01_sfnt_off00011892.bin
dbe58ff6ad22a00f82858b46622a102f6bd56892dac5adb5073bf54f3fa1a837
pdf-font-stream PDF embedded font (sfnt) at offset 0x11892 11328 bytes
font_02_sfnt_off00013298.bin
c892f8b3f5c516c07fe04d3a663be6c73d665d90f327c330c706d8e5c6433a95
pdf-font-stream PDF embedded font (sfnt) at offset 0x13298 18960 bytes