Malicious PDF — malware analysis report

Static analysis result for SHA-256 6be568d5c4b377f9…

MALICIOUS

PDF

124.4 KB Created: 2021-06-10 11:47:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: c9a56a1e295c5dfddf823b377c656982 SHA-1: 05c56ebe85de3af1da6fc983b6e0d001bdb8895a SHA-256: 6be568d5c4b377f9a66e82dfd4981d559c8bb0dce7ae5ab9f3bb406b7f98b172
156 Risk Score

Malware Insights

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

The PDF contains multiple links pointing to compromised WordPress sites, suggesting a phishing or malware distribution attempt. The embedded text 'Download game naruto senki storm 4' serves as a lure. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://chcial.ru/uplcv?utm_term=download+game+naruto+senki+storm+4 PDF link annotation
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/cba86aa669113ef23c47e7f2b1f5cc88/mogaliworivaretuxu.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ef3471bcef---86475391664.pdfIn PDF document text
    • http://aprendanow.com/wp-content/plugins/super-forms/uploads/php/files/aefa4968aab46e2e541d286296a9c1db/sonafu.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/266a7bee0441fbcf094170035e8c6869/bakonapevejaridodevutekob.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bd1f39ce9c---zisazoluwopefu.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/66020e36f5ce99042b15b00674809840/bawatabesodelefazo.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/12708085335.pdfIn PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/m3jh8camtdcko509dt7gem20su/taromagalegaz.pdfIn PDF document text
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/541aa74c79c3b05091dc6e3bdd1ef8f7/kixewikuzamizijuniderewo.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/2b991f2f2bc9d5b7241beec14adbef17/sijuw.pdfIn PDF document text
    • http://lapenya.cat/imgjovesnaves/file/89939091739.pdfIn PDF document text
    • https://lastcallslc.com/wp-content/plugins/super-forms/uploads/php/files/2b62158068e8d7f1561137d544a23c95/sakubuxoregufagojedunati.pdfIn PDF document text
    • http://ajisushionline.com/uploads/files/85097617939.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/523af7618581afceee277ce561c3a137/lurudodalorokiresexi.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/bf44d3fcf97905b655ce9821fdc070c4/80341606520.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000123bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123BB 31796 bytes
SHA-256: fd4116a3e7052e67657bd09d7c3b2dc95f54fa4754b0243fd16fd74947c4aabc
font_01_sfnt_off00018772.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18772 5268 bytes
SHA-256: 0506cfba2575a2e00ccc9ef8756d7f2051ef7ecd1f362625be8b5bcd1ea2e0da
font_02_sfnt_off00019962.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19962 11800 bytes
SHA-256: e9e1ba676f495ba96823af695a792cde9d8f35cd09c565d71a8c2ca9e3fb5797
font_03_sfnt_off0001c031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C031 16280 bytes
SHA-256: 6c6e174f98dde44d2a2d689ea308f7a5c531d648018f514702d95ea3ea8ad7ba
font_04_sfnt_off0001d5c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D5C5 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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