Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea3e9bb2e1996d35…

MALICIOUS

PDF

66.4 KB Created: 2020-11-17 20:58:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 7f06a6b806ae3d1f622b979f5ad3fdac SHA-1: 7eed7968aa49a0a69654f49131b80910c61a206d SHA-256: ea3e9bb2e1996d352dc5de9955401a64249a7cb696dab50805a6c9d484fc4fe3
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://cctraff.ru/aws?utm_term=alaipayuthey+full+movie++mp4 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367938/normal_5f8a293fad43e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479917/normal_5fa8e81c14486.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403537/normal_5fa80f9db5d1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367642/normal_5f97e5372f9d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376857/normal_5fae13ac9f49e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375531/normal_5f9838ff06e10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407552/normal_5f98dbd3dbfe0.pdfIn PDF document text
    • https://farisogu.weebly.com/uploads/1/3/4/3/134307724/rebojuxitozu_paduruf_kofutesupibos.pdfIn PDF document text
    • https://takaranedo.weebly.com/uploads/1/3/4/0/134017801/5bae27c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375515/normal_5f8bc21014e6b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413967/normal_5f9a55ac4c07a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000c6fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6FB 5104 bytes
SHA-256: a462f19b56afd2a56c2c3a2ad67055f0b2e50bf4f599188165699f1459111ee1
font_01_sfnt_off0000d850.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD850 10764 bytes
SHA-256: d1c65f86ffc09d21eb7750b1a08422aba9a01b4dd70cc820eee89da82bbda7b5