Malicious PDF — malware analysis report

Static analysis result for SHA-256 024d6ac1325b997a…

MALICIOUS

PDF

74.9 KB Created: 2021-02-15 20:41:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: cee1b95f39cd7459d00acdf92d0a4583 SHA-1: 13aaef5c8ab67e35f18d1722181c2be6f298f6ab SHA-256: 024d6ac1325b997a79eb34c22c299f63a7efa802fd58a28d6d0ec5fc5c760116
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to known malicious redirector infrastructure or suspicious domains. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate a clear intent to direct users to harmful sites. While no scripts were explicitly extracted, the nature of the embedded links suggests a phishing or malware distribution attempt, likely initiated via spearphishing.

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
  • 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.
  • 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.
  • 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/strik?utm_term=fundamentals+of+philosophy+8th+edition+pdf In PDF document text
    • http://life50it.pro/kopujirenisubigururabiso3802y.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416792/normal_5fefa681cd947.pdfIn PDF document text
    • https://menafemudiwifog.weebly.com/uploads/1/3/0/8/130813668/8429604.pdfIn PDF document text
    • http://originalhallyu.com/pipikozulujosuredizituguz5e2ia.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368742/normal_5fc9c9b3316d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481418/normal_601a229445879.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/sivanira/la_senza_bra_fitting_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gogoxowiniza/bogarexufidorezavasebamej.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/black_hole_formation.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/jquery_carousel_evolution_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/43615925400.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/diameter_radius_and_circumference_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/visagogijulep/agar._io_mod_apk_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/air_core_transformer_efficiency.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/47111053147.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d899.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD899 3764 bytes
SHA-256: feb62eae83f25d20e8c5d5f01b96af24312164395f30407c2043943d337353ec
font_01_sfnt_off0000e5e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E8 5436 bytes
SHA-256: ecce697a17346b3a90fe91548868b686f793496d1afe6c20594248af2589304b
font_02_sfnt_off0000f84f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF84F 11220 bytes
SHA-256: 8f110332533d9c016a1a06f63070a10d4b228ce51b2f28ef70dfcf7a0ea00c87

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