Malicious PDF — malware analysis report

Static analysis result for SHA-256 b62ba94642fa9825…

MALICIOUS

PDF

86.4 KB Created: 2021-04-04 21:19:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be4ea1e6ecdc70c35a43d8c1262525c1 SHA-1: 421c8be7b922f17c0a26f043da2279451addeff4 SHA-256: b62ba94642fa9825eee2a59a4f993240f25bac7aa28a4785b9bdf44534c35971
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, references 'Sex and the City' and includes metadata from wkhtmltopdf, suggesting a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nipisod.ru/aws?utm_term=sex+and+the+city+reboot+samantha
    • http://coolvdomaion.online/715126434389dl8x.pdf
    • https://cdn-cms.f-static.net/uploads/4452594/normal_6050d97854646.pdf
    • https://cdn.sqhk.co/dakubakasilu/gh6kifa/47418013218.pdf
    • https://cdn.sqhk.co/vopofuxo/cjddjg9/descargar_no_crop_for_instagram_apk.pdf
    • https://xexigajusotojuz.weebly.com/uploads/1/3/1/6/131606060/496784.pdf
    • http://flash-sar.online/939878530435v8w5.pdf
    • http://supportcopyright.net/child_of_god_movie_trailervlmsj.pdf
    • https://cdn.sqhk.co/kafosine/gcYhige/helly_hansen_life_jacket_size_guide.pdf
    • https://cdn.sqhk.co/dijabidasu/N3uvidV/kaiser_permanente_hawaii_phone_number.pdf
    • https://cdn-cms.f-static.net/uploads/4382004/normal_604e055ca1ac3.pdf
    • http://hopecommunitynaz.com/conjunctions_test_worksheetufqkm.pdf
    • https://xitukamobem.weebly.com/uploads/1/3/4/6/134643312/9479348.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://f1ddcea9-c323-452c-a4d3-aaefec61e50a.filesusr.com/ugd/defd8a_ec8a3c75a28c481fa654e7c324f7c485.pdf?index=true
    • https://uploads.strikinglycdn.com/files/ad5c493a-1d45-4e29-858d-03a269e596c3/where_has_a_wealth_tax_worked.pdf
    • https://uploads.strikinglycdn.com/files/f1d15ff9-0cfd-40b8-8b35-5b55266cb48f/23440113645.pdf
    • https://47e4df30-8702-49a4-8bd5-327e1546ff06.filesusr.com/ugd/379272_d4434e8f535c446390c5c92c4def20c6.pdf?index=true
    • https://f3dbd103-cf2f-44fc-b0ad-c9004dc38af2.filesusr.com/ugd/1f2646_a5483299cebb412aaf682b650217ad1a.pdf?index=true
    • 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://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee04.bin
b2714c0ebe68e794055757f2ee511d95cdd585fddbd8df507712555d992d664b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE04 5348 bytes
font_01_sfnt_off00010000.bin
741e76fb0bf282beb0349b66b63885252d3c3ac0b92051cb703a00cf9b36d15d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10000 11400 bytes
font_02_sfnt_off00012738.bin
dbe1f6873dfbc63a557840fa26764ed1e24daf10180a919a5f50e881975b6f06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12738 16148 bytes
font_03_sfnt_off00013c47.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13C47 4324 bytes

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