Malicious PDF — malware analysis report

Static analysis result for SHA-256 816874d0be35c065…

MALICIOUS

PDF

42.7 KB Created: 2020-10-06 15:28:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 6d32a10b0a6c57a7dae705782137a78d SHA-1: e18da8da05388a2b2e31faeab5d4cebd6ae99266 SHA-256: 816874d0be35c065d1d3e1e02f267d5844c30d2546a74d53f75c69c02361ee53
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=french+revolution+lesson+plans In PDF document text
    • http://guzelak.trumbullpolicecadets.com/uploads/1/3/1/3/131383309/4406560.pdfIn PDF document text
    • http://files.consultaire.co.za/uploads/1/3/2/8/132814974/036c261b69.pdfIn PDF document text
    • http://pasapum.faithfilledrebel.com/uploads/1/3/2/6/132681946/5fffc7d5987a76.pdfIn PDF document text
    • http://wizuri.menehunebasketball.com/uploads/1/3/2/8/132815213/fexenotugujirabofuxi.pdfIn PDF document text
    • https://site-1040223.mozfiles.com/files/1040223/vewajupibotezoxodatibif.pdfIn PDF document text
    • http://files.shaluksgardensolutions.com/uploads/1/3/0/7/130775151/783827.pdfIn PDF document text
    • http://files.skeidvellir.is/uploads/1/3/0/7/130776483/nusinawepiz-zasegaroleken.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/1/0499/3309/0974/files/plants_vs_zombies_heroes_hack_apk_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0487/9856/4517/files/genie_model_acsdg.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_off000069a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69A4 5036 bytes
SHA-256: bd26de6f0c6b2869b1a803051619912e9d907e49823a2c3f562aae79567d4fb2
font_01_sfnt_off00007ac9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AC9 10296 bytes
SHA-256: ea9f7bb53f35e3cd22e8e89a54336d7661bae28755a76260b871180e63f3fdf9