Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a101069382c8c4b…

MALICIOUS

PDF

67.7 KB Created: 2021-02-11 20:38:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: facc3fad0ba70314d7afcffbca7e58c9 SHA-1: 4b1b666521e0dae704d7182fb242c7d74e679ca6 SHA-256: 6a101069382c8c4b27459c82158251ee29967353f882461c16a85224580327d4
196 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
  • 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.
  • 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://druttle.ru/wix?keyword=solving+systems+using+matrices+worksheet+answers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4463009/normal_5fc8a624928db.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365576/normal_5fcd1d7c35e34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411918/normal_601d725b545b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379217/normal_600fd0f4d4ebc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378167/normal_600c9a5a3e8fe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424646/normal_5fcf7e8a94dbd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409826/normal_5ffd5a7e73c46.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443610/normal_5fef5a918fd5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369779/normal_601f6e577f0d5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375339/normal_5ff099e3be24c.pdfIn PDF document text
    • https://witojezig.weebly.com/uploads/1/3/0/7/130776148/wamute-xumefagemi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nuzavaxevarap.epizy.com/tor_coatings_data_sheets.pdfIn PDF document text
    • http://nefaped.epizy.com/sofajuxene.pdfIn PDF document text
    • http://posujozu.epizy.com/atriplex_lentiformis_ssp._breweri.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c8ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8EE 5636 bytes
SHA-256: 7f42db970d74b772b4634ea32f7352eef293745a9304bee9889e4ebbeb71386a
font_01_sfnt_off0000dc08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC08 10368 bytes
SHA-256: 2febc0e834c5921af7ba731ee75de7369194a405919724d6e2b9003a4e5de840