Malicious PDF — malware analysis report

Static analysis result for SHA-256 f010faac87ab2b07…

MALICIOUS

PDF

40.3 KB Created: 2020-11-07 19:33:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 7bb77cc899bf3631672a3f270c1f7a2d SHA-1: 240f40403ce434dddbf313dc6e5845c4fb79b589 SHA-256: f010faac87ab2b076e240ee27e08a70afea83061309979a06fb3d88329bc15f6
96 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffset.ru/123?keyword=hitman+sniper+apk+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4426551/normal_5f9e8342a4472.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379626/normal_5f92615f0bf9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368487/normal_5f8f5d847ce75.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/58ae1b58-b31f-4a3c-84cc-9fc36428b87d/hama_bluetooth_usb_adapter_driver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dfbcef7-d9a6-4ae4-986d-e668eb3098c8/77925935550.pdfIn PDF document text
    • https://tuxabavijig.files.wordpress.com/2020/11/37940387668.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e7aa4a8-5011-41a0-802e-cd12de2207b6/40273455911.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/dugajoka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ec90f5b-c130-4091-86aa-cb118ccdc45b/pipevemenodofosisav.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/epinephrine_hormone.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_off00005eb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EB4 5040 bytes
SHA-256: ef023258130a91efde167d66043ace2f56c7d74fba33beeaf5fb95069b4c55e1
font_01_sfnt_off00006fbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FBF 10952 bytes
SHA-256: 79631d5702d0ed42a0181097e63d3b5827bb597c7f6f78708391ca875518f58f