Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca30462471f6a9e6…

MALICIOUS

PDF

43.8 KB Created: 2020-11-06 10:16:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: 977366068d26804db21a02372d02f608 SHA-1: 823c0e8ea9d1a15b2ce4d1f483621c40607ef83b SHA-256: ca30462471f6a9e690b245505e98a93149e1e3202baaa8db0563cf0207938e0b
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://traffine.ru/aws?keyword=grim+fandango+apk In PDF document text
    • https://lilawowawumoxo.weebly.com/uploads/1/3/1/4/131453384/xotobejuwogo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369788/normal_5fa4f59707d15.pdfIn PDF document text
    • https://tejebufu.weebly.com/uploads/1/3/4/3/134353082/mavoniguxizub.pdfIn PDF document text
    • https://gavuzolarot.weebly.com/uploads/1/3/4/4/134458525/kuxabow.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/bosilo_ginasesif.pdfIn PDF document text
    • https://retagavit.weebly.com/uploads/1/3/4/3/134363188/1473757.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/luxelula/27675725582.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/sibokebiwavepidiropafevuv.pdfIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/west_hills_athletic_club_kalamazoo_michigan.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/95928229405.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/bisexual_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/vopadofugon/97430790606.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005cf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CF8 4836 bytes
SHA-256: cfe5a1546a9d6da28dbce3fef89e6f35e8f9d6bc30d3c9d0d0f2a84490b23924
font_01_sfnt_off00006d48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D48 11664 bytes
SHA-256: b6291e9b6bde1da81620de4e03f691e08a54a939c804ec857ed31288cc55d5a7
font_02_sfnt_off000094cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94CF 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71