Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef9c88a61021a45f…

MALICIOUS

PDF

63.1 KB Created: 2020-11-21 01:21:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 62d4bfc6910892f7b4ada7958c4b0b37 SHA-1: fdabdda379791a12fef8f30161a32b6dd27067dc SHA-256: ef9c88a61021a45fe129792ec405065bed33731abb507fb1783e48726d1b3a00
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://trafffi.ru/aws?utm_term=formosa+prosonic+annual+report+2018 In PDF document text
    • https://liwobolavus.weebly.com/uploads/1/3/4/1/134131542/fifukomukipegik.pdfIn PDF document text
    • https://natagudere.weebly.com/uploads/1/3/4/5/134526504/zufukuj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479474/normal_5fa9cc4490732.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369487/normal_5fad7d3f2399e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420470/normal_5fb6200a1c5ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379377/normal_5f95d16e6d4fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388162/normal_5f9cdd776d737.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405903/normal_5f9903f75fba5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a5d5fe7-5d3f-4440-9215-eb5e42ee342e/gajojubuwasolejutez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd70f039-4a63-4a63-9695-0d7d4cf968ad/wetutunefoxavona.pdfIn PDF document text
    • https://s3.amazonaws.com/damevusom/sogizututojotalin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/349ee9fe-7db8-482a-adfd-4ff0126286d5/99732331271.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75cd69d0-56bc-46f4-8737-f278d4c5c5d3/pexado.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/nibimidak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f032beaa-7a24-49b3-8114-844b65491360/sony_vaio_2008.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_off0000b96e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB96E 5552 bytes
SHA-256: 8934f3cb23e44aa34b5b2e16927bafaa6418cad1c61a0c35197e99a166fb6f62
font_01_sfnt_off0000cc3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC3A 10320 bytes
SHA-256: 4c8a9004f01e87b519b97702649f4612601fee7d209b9e9363df1582cd0b5293

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