Malicious PDF — malware analysis report

Static analysis result for SHA-256 3684423f885e5016…

MALICIOUS

PDF

74.8 KB Created: 2021-02-21 18:03:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 960b6ada5ad16c171a5fe0c5f7e10c18 SHA-1: 2313943b61da57426a11a48c8594f1d949f0aea2 SHA-256: 3684423f885e50168cb1ee0d7c12caf5931061569028a56a78fd42a86d65c6d9
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, a common tactic for link farms or phishing. The heuristic 'PDF_SEO_LINK_FARM' specifically indicates a mass of external links, suggesting a malicious intent to direct users to potentially harmful sites. The ClamAV detection and ML classifier further support the malicious nature of this PDF.

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://maypoin.ru/strik?utm_term=how+long+will+a+2014+honda+crv+last PDF link annotation
    • https://ninitirasaru.weebly.com/uploads/1/3/5/3/135317350/nokan-xasajavawu.pdfIn PDF document text
    • http://naturaitalia.space/eso_clockwork_city_fishing_guideadgpc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470218/normal_60066942b0ce1.pdfIn PDF document text
    • http://clipshd.design/2861079406951c9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380530/normal_601fe517e26b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417659/normal_600d6f46b13ec.pdfIn PDF document text
    • https://mirodogewe.weebly.com/uploads/1/3/4/8/134861862/wusumoratu_vibuvili.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/tifuwuw/jakuzexiduterom.pdfIn PDF document text
    • http://zunuwovadete.epizy.com/daxumujubixovatuxibuze.pdfIn PDF document text
    • https://s3.amazonaws.com/gateme/epilepsy_diagnosis_and_treatment.pdfIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/lesaxetufiz.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/nejetukiwejokalerot.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/rekisikilo.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/51463220551.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/the_historical_novel_lukacs.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/android_progress_bar_animation.pdfIn PDF document text
    • https://s3.amazonaws.com/wesezuzuvalirik/10391272488.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e70f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE70F 5728 bytes
SHA-256: e8df93db47e7a1df21b94c58c897dc20e6de0950592082cde63d5e73d006665f
font_01_sfnt_off0000faaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAAF 10444 bytes
SHA-256: e91aa7b6a550fbffd9f60c5c2584dc61ce9b73ee0355a19e6291c31da56bab28

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