Malicious PDF — malware analysis report

Static analysis result for SHA-256 6995041aeee70c5d…

MALICIOUS

PDF

58.9 KB Created: 2020-11-13 01:48:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 7495dc7f2ee390256928b3fe8f6f1394 SHA-1: d8f1e9f1be6b3f570933f5ecf009eb00a7c2638f SHA-256: 6995041aeee70c5d0b9143f5b0cdf852fa8e5830e3a657d4d3581daabb358bc7
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan-like behavior. It contains a large number of external links, suggesting it functions as a link farm to distribute malicious content or engage in SEO manipulation. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly support this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffnew.ru/123?utm_term=lionshead+caps+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4410217/normal_5f945ce45b587.pdfIn PDF document text
    • https://fexejolimoti.weebly.com/uploads/1/3/4/1/134131812/4477927.pdfIn PDF document text
    • https://xovifare.weebly.com/uploads/1/3/4/5/134524114/ragivas.pdfIn PDF document text
    • https://xigokerurubupa.weebly.com/uploads/1/3/4/3/134312623/mevefizafubumuvive.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385004/normal_5f9098a9130db.pdfIn PDF document text
    • https://jirewolekaza.weebly.com/uploads/1/3/4/3/134387643/tavunovuf_gevumogo.pdfIn PDF document text
    • https://sepetumeba.weebly.com/uploads/1/3/4/6/134601334/famab.pdfIn PDF document text
    • https://noloturajikule.weebly.com/uploads/1/3/4/4/134486045/89b06106.pdfIn PDF document text
    • https://boguvetasitob.weebly.com/uploads/1/3/1/3/131380850/9298899.pdfIn PDF document text
    • https://purolejomi.weebly.com/uploads/1/3/0/7/130776639/xoramusawug_kafegosuruwo_fopedunowito.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/senodiw/amadou_hampat_bah.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/pokemon_3d_games_apk_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/simple_employment_contract_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/greenworks_60v_chainsaw_manual.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_off0000ab93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB93 5164 bytes
SHA-256: 8d90799b1c2281b0eee76f2d79842d1fa94b73b1eaa66c664aa8ee07c40d9e31
font_01_sfnt_off0000bd30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD30 9952 bytes
SHA-256: f96ad04d25c452a54ba2747b144215e4d6e0d20a3e45020e306102d8f4f2215b

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