Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ecb44e8945f51d3…

MALICIOUS

PDF

69.3 KB Created: 2021-01-19 07:59:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: e737cf868130a8ac0551a97274d75792 SHA-1: 001157cd053b37fc0a0f7960964e1841baa66c9b SHA-256: 2ecb44e8945f51d349dc99cf17aeac590e29a7bd2744c5d14d7be0c204ef2ed5
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://yafferge.ru/wb?keyword=tiktok%20video%20without%20watermark%20iphone In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366395/normal_5f876db8333d4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384828/normal_5ff594427fe52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448121/normal_5fd12924b7d0a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472198/normal_5fee3178a9b3d.pdfIn PDF document text
    • https://cdn.sqhk.co/tikugubobo/jdbjcgg/23972824497.pdfIn PDF document text
    • https://cdn.sqhk.co/fexejikexew/hijf1mu/general_hospital_cast_changes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460457/normal_5feb4671e5321.pdfIn PDF document text
    • https://cdn.sqhk.co/susojitigi/R61hcOy/pandora_love_heart_ring_gold.pdfIn PDF document text
    • https://cdn.sqhk.co/definuseju/2D3OMQM/10969583989.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473056/normal_5fc169ff92e95.pdfIn PDF document text
    • https://site-1212674.mozfiles.com/files/1212674/51286017350.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374518/normal_5f9cb7a94ccb3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368975/normal_5f8f694238620.pdfIn PDF document text
    • https://cdn.sqhk.co/sivunukiwe/hegeB2o/bucket_list_ideas_travel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/defujo/gasuduzapexazepenugezoru.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_off0000d3a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3A3 5152 bytes
SHA-256: f113a84e5786371c85eb8a08fbd31e5ff9b6fa322a3351a320b125f64433b3d9
font_01_sfnt_off0000e515.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE515 10340 bytes
SHA-256: 45d00539feaa65b823fcd30344b8eb603e2581c2c6d70c0fc834db76dc352521