Malicious PDF — malware analysis report

Static analysis result for SHA-256 6edc427d015dd1c6…

MALICIOUS

PDF

43.3 KB Created: 2020-09-30 03:39:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 78d3be8cc225e39187e142c4a83c96bf SHA-1: 537e8e597f5c4e6459cfc3f526c4c685f9e5c945 SHA-256: 6edc427d015dd1c6003995ac73b20b032b481ea377cd754972f7668f3de6c90f
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://cctraff.ru/strik?keyword=basics+of+c+programming%2528+without+data+structures+pdf In PDF document text
    • http://files.beboldyoga.com/uploads/1/3/1/4/131453674/filuwep-sudamusokanek-medobefali.pdfIn PDF document text
    • http://files.akademikreatifindonesia.com/uploads/1/3/1/6/131636828/41bf1c5.pdfIn PDF document text
    • http://regavuja.hemporiumbeads.com/uploads/1/3/2/6/132680852/pipikurikipewakop.pdfIn PDF document text
    • http://wusavo.livinginnobility.com/uploads/1/3/0/7/130739922/43d239e7d2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7418/9480/files/wavemibotasutekogebitefiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0164/2135/files/lil_bow_wow_net_worth.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6670/4550/files/69903450129.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1692/8923/files/goxujedaxuwixokolanu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1916592-9330-4e11-83f1-b80e76a085a7/94781128490.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2be176bf-26da-42e4-8dc4-84018adae0db/vasewulinalumobefada.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_off00006a44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A44 5756 bytes
SHA-256: b4339b4d1ecb25da8017b0ee66481ea3f6184e0ff96de7508ba51c87aeada347
font_01_sfnt_off00007dd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DD2 10024 bytes
SHA-256: 9c3ccf72ac100d9d0347e290c2b019b10fc8241f1b845427eec50ca1f143f0a3