Malicious PDF — malware analysis report

Static analysis result for SHA-256 66471b801d98b736…

MALICIOUS

PDF

98.9 KB Created: 2021-02-16 07:14:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 28c36b2dc87f3cb20cd66c5de7215a34 SHA-1: cc2a69f8503cc37d980c0ddb29f58ecdc982c2e6 SHA-256: 66471b801d98b736c4a0a703777bd38db890f333b56ae05b1a6ec6402d512c69
162 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://yafferge.ru/123?utm_term=music+an+appreciation+roger+kamien+pdf'. This indicates the document is designed to trick users into visiting a malicious site, likely to download further malware. The presence of multiple unknown URLs further supports this phishing and redirection attempt. No scripts were extracted, but the overall structure and known malicious link strongly suggest a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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://yafferge.ru/123?utm_term=music+an+appreciation+roger+kamien+pdf In PDF document text
    • http://mivetys.xyz/casio_aq-s810w_pricey3pj5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478664/normal_6018843686060.pdfIn PDF document text
    • http://about-igsupport.com/297799571wvb9n.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405925/normal_5fd68b7fd5350.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446490/normal_60197cd90536f.pdfIn PDF document text
    • http://gta-msk.ru/leadership_competency_assessment_answers2ms5k.pdfIn PDF document text
    • http://frasqen.online/8865387330doa2j.pdfIn PDF document text
    • http://lienforkid.com/122032041250bzd3.pdfIn PDF document text
    • http://helpcenterbusiness.xyz/75235740392dc34t.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392209/normal_5fdad8e6900fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403556/normal_6026c54cef585.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/guvovigo/timeline_template_for_students.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/23832144256.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/apkreal_spotify_premium_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/functional_style_resume_blank_forms.pdfIn PDF document text
    • https://s3.amazonaws.com/wowonesoribu/cargo_manifest_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/damerirazib/dnd_5e_artificer_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/suwavalovowisewolivezir.pdfIn PDF document text
    • https://s3.amazonaws.com/vogubivajavofu/67214604878.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013355.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13355 4688 bytes
SHA-256: 8aa4adbb2f97f14006364e8b2a0a2df5c1b87d02bc86d69c0b5e46f15b4c6880
font_01_sfnt_off000143c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143C1 5512 bytes
SHA-256: a0e24fde0e17a7fec655a64ab50ea3fcecbf3524932d8b0b1f96c31f824e1114
font_02_sfnt_off0001567b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1567B 11832 bytes
SHA-256: 6b706aea81ca77d3874b38d39e9749726be882406e3c35c969730a6664d942d5

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