Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdd973a2d6429108…

MALICIOUS

PDF

76.2 KB Created: 2021-05-03 14:26:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d86d25e895f1f216d47a4681712e7b0b SHA-1: 5758e79f7acbcb356f86ed1957aa555b30dad327 SHA-256: fdd973a2d642910880c172d14a3f59a05b4c709b466692504d0a0e27ca0494bb
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://xajibur.ru/strik?utm_term=surah+juz+amma+list PDF link annotation
    • https://wedoweniwan.weebly.com/uploads/1/3/5/3/135308992/bizej.pdfIn PDF document text
    • https://pigiwikabulate.weebly.com/uploads/1/3/1/8/131856715/e74769a3ed5.pdfIn PDF document text
    • https://jonimewogil.weebly.com/uploads/1/3/1/8/131860125/dcc0cff9c.pdfIn PDF document text
    • https://lodavoxi.weebly.com/uploads/1/3/4/5/134505118/femij.pdfIn PDF document text
    • https://tedipoji.weebly.com/uploads/1/3/1/4/131408178/wuzagumat-gotanupiwu-garewigowijoziw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://992bddda-184d-467f-a815-0165b41a2208.filesusr.com/ugd/69695d_4e4fd7022bef45c9836db489b9ce79db.pdf?index=trueIn PDF document text
    • https://081e7fb2-604d-424b-9b75-a58d54a71a44.filesusr.com/ugd/abd6ea_9437cf7511ab4bdbbf681ccb3ad64d87.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/16776820214.pdfIn PDF document text
    • https://2ffa788b-df2f-461f-b9c5-573bec542745.filesusr.com/ugd/374ce0_686155661f8a4f7eb5eed5ddeb3f53e0.pdf?index=trueIn PDF document text
    • https://2c8134a4-d865-4da1-8961-c755d7242105.filesusr.com/ugd/6dcf04_acc040ce20174cda80ebece570084b38.pdf?index=trueIn PDF document text
    • https://b8e64ff8-a522-4625-8e91-70fe47930cb2.filesusr.com/ugd/37987b_092a04530d174b6f9f32975308c1c788.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/scroll_saw_template.pdfIn PDF document text
    • https://s3.amazonaws.com/foneniz/30408832970.pdfIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/45312694969.pdfIn PDF document text
    • https://c81c1a69-aec6-471c-ac34-7a6800eafc69.filesusr.com/ugd/9ef1ea_2b1eb9d981814eb984d7b979b9d23eee.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/widetunipet/84984843505.pdfIn PDF document text
    • https://c8f6a2ed-bc8a-4fd4-b26a-19707db7c4cd.filesusr.com/ugd/1cc7e8_6f5db126c53f4c3283c9c7283d0ba1e1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/edelweiss_sheet_music_piano_free.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_off0000ec7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC7A 5156 bytes
SHA-256: 9e4907d1aed7634d1299f1f2c36e19723f1269fb9392d28c4c366ea3677b6165
font_01_sfnt_off0000fdda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDDA 10584 bytes
SHA-256: d9820fc50412c79287f55266c2f90ee17339c7c9680493d96faaab1f94f1ae4b

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