Malicious PDF — malware analysis report

Static analysis result for SHA-256 9612743bae785f36…

MALICIOUS

PDF

39.9 KB Created: 2020-11-09 11:56:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: b0bf4e40015dea7006ccc4c04e64c50e SHA-1: 2a9e9496b777e1114771baaa7cd927a0c5fef553 SHA-256: 9612743bae785f3640fee9087ddc18d58f777d81b8b697fec48cd8dea270c47c
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://traffmen.ru/aws?keyword=guide+gear+tent+instructions In PDF document text
    • https://cdn-cms.f-static.net/uploads/4453720/normal_5fa04064386d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371248/normal_5f8fa31f132f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484631/normal_5fa885dde5a28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365624/normal_5f913d7d14965.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393193/normal_5f932d88e6a44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411931/normal_5f9b54f1ee908.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387806/normal_5fa441ed10c92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370057/normal_5f89dfcf5dfcb.pdfIn PDF document text
    • https://wivupenoremew.weebly.com/uploads/1/3/0/7/130775018/gedemeti_vemopu_nurowetovideler.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421768/normal_5f9e1b8aa00da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368246/normal_5f89f43c6d240.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379722/normal_5f9ad59aca639.pdfIn PDF document text
    • https://fimozafovobas.weebly.com/uploads/1/3/2/7/132741130/3229688.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/zamuriza/makixugopum.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_off00005fe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FE6 5108 bytes
SHA-256: 3e0078138ecc3bb53c5b640a92b15e82099e42cbb0b37cd7bde82e0daa074a62
font_01_sfnt_off00007157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7157 9740 bytes
SHA-256: 85153e2ca330ffd724ce1091a56616d88b7a7d4cebb972c013bc5acf61fb7555