Malicious PDF — malware analysis report

Static analysis result for SHA-256 e88ca62b7fd2d1d8…

MALICIOUS

PDF

68.1 KB Created: 2020-12-24 06:07:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: ccd446800c5a6ff5d1b8164d33142bc1 SHA-1: 106fdc197ee26e5975848a337434a45b51f5a5c1 SHA-256: e88ca62b7fd2d1d8edf5e0e23f3a42777fefb175a561ebb148d1d536693e2648
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs likely lead to malicious content or phishing pages.

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.
  • 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://traffnew.ru/strik?utm_term=events+happening+in+san+diego+tomorrow PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388819/normal_5f911cae12574.pdfIn PDF document text
    • https://fanamavikere.weebly.com/uploads/1/3/4/6/134610997/8498432.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368250/normal_5f88ce8c17c38.pdfIn PDF document text
    • https://bebamewikirebu.weebly.com/uploads/1/3/0/8/130874540/losig_mezifiji_wosuxexa.pdfIn PDF document text
    • https://dubuzosokiboxof.weebly.com/uploads/1/3/1/1/131163723/7299964.pdfIn PDF document text
    • https://pisesiwez.weebly.com/uploads/1/3/1/4/131453260/ad3abfb.pdfIn PDF document text
    • https://cdn.sqhk.co/baxemazisod/ghC9AbF/59015584761.pdfIn PDF document text
    • https://boxomuti.weebly.com/uploads/1/3/4/0/134016719/bitiloxupelavojak.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368985/normal_5fce4e20d1962.pdfIn PDF document text
    • https://cdn.sqhk.co/xibumediw/Zshhgcw/zara_home_mexico_ofertas.pdfIn PDF document text
    • https://cdn.sqhk.co/susiwozobo/BjgDhhy/89197980121.pdfIn PDF document text
    • https://jiwugulepegewi.weebly.com/uploads/1/3/4/7/134717460/setogewumukid.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2a6d46a-cf3b-4d2c-afee-bc89dc77caa6/gewodagidibi.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB03 5452 bytes
SHA-256: 32d1f57f4e9c1fa2ad36ce0538dfa603e561aa885a8144739c93524171da6e7a
font_01_sfnt_off0000dd79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD79 11280 bytes
SHA-256: 0f0106b51c0d849fd8e4360fd788b3b6d3a8454650b5babc73214e1938cae7ef

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