Malicious PDF — malware analysis report

Static analysis result for SHA-256 d78694ba5313b5ef…

MALICIOUS

PDF

43.2 KB Created: 2020-10-09 09:41:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: d03b3ef661a22661da5e705e2340827f SHA-1: b1be69026f7500973f4cebf143d42ead1b763d5a SHA-256: d78694ba5313b5ef0d4463c4f1568d704999e84b22cc5392220c3a02ea3c60a8
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://gettraff.ru/strik?keyword=isaimini+2019+tamil+dubbed+hollywood+movies In PDF document text
    • http://vefurijen.ongaroconcretedesign.com/uploads/1/3/1/1/131164077/tisenunizijuku.pdfIn PDF document text
    • https://site-1039549.mozfiles.com/files/1039549/97645398550.pdfIn PDF document text
    • https://site-1042620.mozfiles.com/files/1042620/rinezawalurax.pdfIn PDF document text
    • https://site-1039878.mozfiles.com/files/1039878/pupisosotevumoza.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/1/0484/2153/5912/files/sea_isle_city_rentals_by_owner.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/9425/8079/files/mebatugejurujarisixajopi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8771/9320/files/supplementary__congruent_angles_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/9021/9686/files/fumumed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7744/4800/files/33330112595.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4946/6526/files/western_unimount_plow_parts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7686/1086/files/25674194518.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_off00006944.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6944 5784 bytes
SHA-256: 9f7da93f3ba6da05b2e8bf368aa44915bc91943dd3240a64840654d8ff24a2cd
font_01_sfnt_off00007cdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CDF 10172 bytes
SHA-256: 285f858594edd6dd32423cf4d80040a2ba7f26bd4ae32e9a7c1e1c5dfafceb02