Malicious PDF — malware analysis report

Static analysis result for SHA-256 623d86f4186ed44f…

MALICIOUS

PDF

41.3 KB Created: 2020-11-03 14:27:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 6738bdf89b7f4164d5c73e8dc1e7972f SHA-1: 1a67578acd92a2a4a50d3ddc7a9358730b045bc6 SHA-256: 623d86f4186ed44f0c033305ca1ffa8898cd2eb6349f5ce7dbfdbd579cc7ba82
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://ttraff.me/123?keyword=lesson+3+review+science+answers+6th+grade In PDF document text
    • https://lirutuve.weebly.com/uploads/1/3/4/4/134462413/kokateniluxekatojo.pdfIn PDF document text
    • https://jiwepurojal.weebly.com/uploads/1/3/0/7/130775762/rexezigiwer.pdfIn PDF document text
    • https://sifizebutu.weebly.com/uploads/1/3/0/8/130814914/valinejeturiwo.pdfIn PDF document text
    • https://wipomozexabezi.weebly.com/uploads/1/3/0/7/130776841/biviw_giguv_liwonir_wozowabov.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/midaguvimabof/88165433586.pdfIn PDF document text
    • https://s3.amazonaws.com/zetubakuz/77516349041.pdfIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/86257035196.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/45155302234.pdfIn PDF document text
    • https://s3.amazonaws.com/pusumowi/77789694762.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/55682358254.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/do_white_candles_burn_faster_than_colored_candles_experiment.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_off0000555c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x555C 5368 bytes
SHA-256: de7f83c203bea81db0ce561344bd2957a65ceac6ff3fc875defb7463bb9d6648
font_01_sfnt_off0000679b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x679B 10100 bytes
SHA-256: 504b3bda0498b8396d03f57c30ea653bc8cfdad2bf4a91bed46c5e3ff8ee8ed4
font_02_sfnt_off00008a41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A41 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f