Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebce87a83fde40d8…

MALICIOUS

PDF

72.0 KB Created: 2021-01-11 11:43:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 2aa44fb6dbec2e7e5e9d186f306bf751 SHA-1: 6406359a92a81df560764303ce2a0c6d73243914 SHA-256: ebce87a83fde40d82300ed39169cbdf2ac7260c702b8f93a330eecf8edf5e977
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://ggtraff.ru/123?utm_term=uta+hagen+libro+pdf In PDF document text
    • https://rilitovewub.weebly.com/uploads/1/3/4/0/134095842/4535749.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454808/normal_5fbf270c00d2e.pdfIn PDF document text
    • https://cdn.sqhk.co/dijogiper/SvYgjii/blastzone_2_lite_arcade_shooters.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/76c30d49.pdfIn PDF document text
    • https://jupoviladuxeru.weebly.com/uploads/1/3/4/3/134310568/385525.pdfIn PDF document text
    • https://kojazuzok.weebly.com/uploads/1/3/1/4/131438397/ziladegikepamoz_velixogemazeko_nodegum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374196/normal_5fa1f27d29236.pdfIn PDF document text
    • https://roturusuwanowus.weebly.com/uploads/1/3/4/3/134363773/lileto.pdfIn PDF document text
    • https://balijuwil.weebly.com/uploads/1/3/4/4/134403438/2a1093.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/vexeliku/video_er_app_ipad_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/sumiwirumogijak.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/giinii_digital_picture_frame.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/11734870671.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/marutawovazozil.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/tv_guide_perth_western_australia_today.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_off0000da85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA85 5256 bytes
SHA-256: 59a3271680131958a87f74f02cfecf242b5a58668a7c302f61866da6b79c2e7f
font_01_sfnt_off0000ec5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC5E 11504 bytes
SHA-256: 93ae406215b927ff076e78126c85bd29eff020d839a854df3c5844d6b45d7f8c

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