Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4daa8e7754d017e…

MALICIOUS

PDF

66.9 KB Created: 2021-03-07 08:27:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: dc827154c363441806dc912c0acf7770 SHA-1: 26b195c998292ab182622fcf0a4d4c3cd65da78d SHA-256: f4daa8e7754d017eaa8ac103ec96e617fde1cdd61974f796fe9d3d05a4ff5c19
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://dafemum.ru/wix?keyword=wolfcraft+router+table+for+sale In PDF document text
    • https://cdn.sqhk.co/xumesapaxoku/JhgifK5/vanuxanerofelil.pdfIn PDF document text
    • https://nalatuzub.weebly.com/uploads/1/3/4/3/134324595/5354489.pdfIn PDF document text
    • https://cdn.sqhk.co/buwozumu/ghiaibv/joomla_quickstart_template_free.pdfIn PDF document text
    • https://giderolimarova.weebly.com/uploads/1/3/4/0/134098849/fecb8.pdfIn PDF document text
    • https://gejosubirimo.weebly.com/uploads/1/3/0/7/130776575/8738153.pdfIn PDF document text
    • https://wubinuju.weebly.com/uploads/1/3/4/6/134642725/jokefuvog-kotonukid.pdfIn PDF document text
    • http://paksorond.xyz/year_gap_affidavit_format_for_tcsf9ko8.pdfIn PDF document text
    • http://health2health.online/402498614002rp4n.pdfIn PDF document text
    • https://fejejupusojovif.weebly.com/uploads/1/3/1/4/131483068/gomuganeje_vukid_fugof.pdfIn PDF document text
    • https://cdn.sqhk.co/kerosumumato/gewjfgf/planets_in_order_from_the_sun_song.pdfIn PDF document text
    • http://pl50off.info/xelujipc1fs.pdfIn PDF document text
    • http://thedopemarketing.com/beretta_m9_holster_blackhawkdnv4f.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/laradusa/student_login_form_in_html_code.pdfIn PDF document text
    • https://s3.amazonaws.com/pegebunov/wiredukiz.pdfIn PDF document text
    • https://s3.amazonaws.com/nedijowewoded/hollywood_movies_in_english_subtitles.pdfIn PDF document text
    • https://s3.amazonaws.com/fisulefajow/gipisovamumifazagenipu.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/52695031141.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/full_hd_movies_links.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50ad90d2-98ad-4773-b1e0-e1474c0cf6d7/57054086604.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3744f50-d5b0-4c95-b1fb-b57588ccd4f5/zubovadojuzusibapajezuved.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_off0000c90c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC90C 5028 bytes
SHA-256: 5451c483c93da0b4b1512f7a2a066cd4c34e2a799c7d53d208abdc967f949e71
font_01_sfnt_off0000da43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA43 10564 bytes
SHA-256: 5d9cc55c994d7cab4e16a2a8c7f1d39c7a7a6380b965c8ead0c7d766c40779a9