Malicious PDF — malware analysis report

Static analysis result for SHA-256 49807595b585c395…

MALICIOUS

PDF

81.8 KB Created: 2021-09-10 15:12:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 8f23d81f1fd92f46cd118fea185053a3 SHA-1: de0d7d318dea8b06959b4f4a6ada6f80538eac88 SHA-256: 49807595b585c3959581c596b7b796e00eb50b377a819b20d24e886ca5e64632
172 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and a significant number of external URIs, many hosted on compromised CMS platforms, suggesting an attempt to redirect users to malicious content. The presence of a 'download button' heuristic further supports a lure-based attack pattern. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://allytemp.ru/uplcv?utm_term=mp3xd+descargar+musica+gratis+para+celular+android PDF link annotation
    • http://e2ingenieros.com/ckfinder/userfiles/files/69591488693.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/35390d2860a3f2bc0eb614fc5aab533f/xazoju.pdfIn PDF document text
    • http://dragonera.cn/admin/userfiles/file/12892538097.pdfIn PDF document text
    • http://okudshava.ru/userfiles/file/16586433935.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/d1p121ead0asetuje9etfmo17i/14411889601.pdfIn PDF document text
    • https://raiporjai.com/piceditor/file/78737387395.pdfIn PDF document text
    • http://dryoucosmeceutical.com/userfiles/files/gidawuramikajeketovubo.pdfIn PDF document text
    • http://sz-nuoyi.com/Upload/file/2021090919133873302.pdfIn PDF document text
    • https://n-zvuk.ru/upload/file/55698558696.pdfIn PDF document text
    • http://sanalights.com/admin/admin/uploadfiles/file/17161981383.pdfIn PDF document text
    • http://thriftstorewebsites.net/flash/thriftstorewebsites.net/file/70494264069.pdfIn PDF document text
    • http://onlinecommerce.bg/uploads/pages/files/sibopisuluginomogogo.pdfIn PDF document text
    • http://packamate.com/userfiles/kefusudati.pdfIn PDF document text
    • http://everbeenmagnet.com/js/upfiles/files/tebexojalefakedijezij.pdfIn PDF document text
    • http://fueandhair.com/userfiles/files/20946514001.pdfIn PDF document text
    • http://porpora.group/imagenes/imagenes_contenidos///41552675019.pdfIn PDF document text
    • https://wsbe17hongkong.hk/_bin/ckfinder/userfiles/files/jiporeletudokidaxoj.pdfIn PDF document text
    • https://okud-istra.hr/userfiles/file/52468353694.pdfIn PDF document text
    • https://nnt52.ru/userfiles/file/26315509172.pdfIn PDF document text
    • https://unicon-msk.ru/data/files/kulebubijebarelijur.pdfIn PDF document text
    • http://pinzimoniofiumicino.eu/userfiles/files/23263132754.pdfIn PDF document text
    • https://uangraja.com/contents/files/78925758065.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/022d5cb3d955ca16a2cf7589eb6e5278/53043911953.pdfIn PDF document text
    • http://cen7dias.es/userfiles/files/vagudovexu.pdfIn PDF document text
    • https://manajrgvaaradhi.com/cms-uploads/files/35054662225.pdfIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d21f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD21F 20400 bytes
SHA-256: b4cad929109e8d600d6a5fb9784a4c7f3f79816224e3169ad930de3ddf4b6845
font_01_sfnt_off000106c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106C5 11224 bytes
SHA-256: 5fd8a008c6ace4344dd50b17a2137af3e580829f400cd52183030d0dbdb80f77
font_02_sfnt_off000120e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120E8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.