Malicious PDF — malware analysis report

Static analysis result for SHA-256 1697aefcdec5999a…

MALICIOUS

PDF

103.5 KB Created: 2021-06-17 11:42:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 67d09129062a96c9f04b5e8563890725 SHA-1: a92ffb36175dcd4a7580ead4b3dbae881ab7101e SHA-256: 1697aefcdec5999a2553c9d15d2c1e3753e8781490cd62b6fc51521a2f80b0ae
164 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which appear to be compromised or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download button' heuristic and ClamAV detection as 'Pdf.Phishing.Trojan' further supports a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains text related to game downloads, aligning with a lure to trick users into downloading malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://inwebjor.ru/uplcv?utm_term=naruto+ultimate+ninja+storm+4+apk+download+latest+version+2020 PDF link annotation
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/9ebad369eebec49433148a5ece4535d8/tasirenimak.pdfIn PDF document text
    • http://ty-universe.com/image/files/20210531_184520.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/49948536444.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a769164636e---poniwiruxutu.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160786938bd519---68624604492.pdfIn PDF document text
    • http://activesolutionelectric.com/images/file/43364685744.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/fa5fd9dbacea7959e1872886613d6050/jutevawowedegosupinuroxi.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4051c51d4a---70320957104.pdfIn PDF document text
    • http://m2m2design.com/userfiles/xezuzosi.pdfIn PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/463e114b65f0ba09290a2ec0f3318c67/58711192122.pdfIn PDF document text
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/c0827d4cec19ea9247ea3acf6d99858e/duxesonajatufusosanuz.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/29f165dfcade00b1a538f62095e16b8b/jidomikibofotidefexil.pdfIn PDF document text
    • http://www.dismaplant.com/ckfinder/userfiles/files/kivojunubibilaxas.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/4165e45c604bd67789cb4710b4c7f94a/woluxovifejetimewavozeni.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/zeladizasux.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf9b5f66d30---91846455380.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/7anr4gs3m077krbgunh2fngf42/1044739790.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609dcd8ad3d7a---kanefigosupisijonidukuku.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012d8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D8B 3296 bytes
SHA-256: d03a8fb7f74e7804f3940661e04ff4e252ac6395de31dbedd8911191b9af50a1
font_01_sfnt_off0001395f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1395F 5608 bytes
SHA-256: a70df905ada382353bb6870519421729131ecf0c718b00d5112b1e09b3d43bee
font_02_sfnt_off00014c7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C7F 23612 bytes
SHA-256: 5dc41ccf307f149f89f1d2dd58e61c5cd641f9cf93e11f83f22172ea9b78a53f
font_03_sfnt_off000181a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x181A9 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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