Malicious PDF — malware analysis report

Static analysis result for SHA-256 49064f3686184806…

MALICIOUS

PDF

97.2 KB Created: 2021-02-06 21:04:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 805b0513fcb47efac1349baa784dc31c SHA-1: d084510499e8dcaa108e3569fd48c685164904b1 SHA-256: 49064f36861848067789d806a79a004d8d80b879b8e6382893846ffb5bfdedc3
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, with one pointing to a suspicious domain 'bologen.ru' and another to an Amazon S3 bucket containing a PDF. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. The heuristic 'PDF_SEO_LINK_FARM' suggests the document is designed to host numerous links, potentially for SEO manipulation or to distribute various payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://bologen.ru/aws?utm_term=anecdotal+record+form PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4420905/normal_5fe487447b552.pdfIn PDF document text
    • http://xtreme-sport.ru/dasuwajupzc67z.pdfIn PDF document text
    • https://cdn.sqhk.co/kususarefeja/hNhehe2/96980298097.pdfIn PDF document text
    • https://lepamume.weebly.com/uploads/1/3/4/8/134882258/naloviwipamavuveviwe.pdfIn PDF document text
    • https://vanufutalolu.weebly.com/uploads/1/3/1/1/131164160/jusevigovefomuwotiz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450512/normal_6000f6229df47.pdfIn PDF document text
    • https://kinotadi.weebly.com/uploads/1/3/1/6/131606109/tutop.pdfIn PDF document text
    • https://suwuvonujijipi.weebly.com/uploads/1/3/4/0/134042364/ridodafuwofobuwof.pdfIn PDF document text
    • https://cdn.sqhk.co/xadowififux/Ghhiche/lezim.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449603/normal_60009f2dc3d21.pdfIn PDF document text
    • http://yatvoyya.fun/medicina_ayurveda_vata_pitta_e_kaphayc0fv.pdfIn PDF document text
    • http://hurricane1.space/best_songs_of_2019_clean_youtubexwemo.pdfIn PDF document text
    • https://cdn.sqhk.co/jirudumom/gdjfjb5/musesobirowojosupuxunim.pdfIn PDF document text
    • https://limofagis.weebly.com/uploads/1/3/4/6/134640762/c5abe325.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/telephone_answering_machine_that_beeps.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/20738129723.pdfIn PDF document text
    • https://s3.amazonaws.com/bomupi/arial_pro_black_italic_font_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wizedumi/11073963952.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/abo_sadam_whatsapp_apk.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://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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001291b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1291B 4976 bytes
SHA-256: 63d3c3221af2a1c827a75ac4f57cfcf9599da5dab25f47ee3677522e0d2e349d
font_01_sfnt_off000139f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139F1 11668 bytes
SHA-256: c1b11c03bb40cbda842b6c5c2ecd35d00110c59b20d175af40408301d4918f82
font_02_sfnt_off000161f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x161F0 16140 bytes
SHA-256: 3f83bbfb2e03141a9083badfb1da6e2b1773f9aa6b1ed8f30fc2d392a5ee3553

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