Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fc04c7f76ea176c…

MALICIOUS

PDF

44.9 KB Created: 2020-10-29 21:03:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-10
MD5: 059322cd52a81fa7c3e0ab64b3ba444c SHA-1: 37279c05b1e1ad51d078f166dacb5caff7475a0c SHA-256: 5fc04c7f76ea176c6a3e798cfd69640000c3468a67cf187a493c27cac704ddf3
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://ttraff.link/pify?keyword=dmv+2015+written+test+answers+california In PDF document text
    • https://cdn-cms.f-static.net/uploads/4371267/normal_5f8af4317b6d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381083/normal_5f970ee9741e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404969/normal_5f9271267ec7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370054/normal_5f90f745a7194.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368750/normal_5f893a1cc8777.pdfIn PDF document text
    • https://nogafuku.weebly.com/uploads/1/3/2/8/132815296/5987814.pdfIn PDF document text
    • https://pozuzabo.weebly.com/uploads/1/3/4/4/134432083/0bec62e75.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000060c0.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000060c0.bin)
    • http://www.daltonmaag.com/In extracted file (font_02_sfnt_off00009876.bin)
    • https://cdn.shopify.com/s/files/1/0431/9212/3556/files/cultivo_de_arroz_en_colombia.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/getomulid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/7566/3540/files/vapixavinexupigi.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/wixoz.pdfIn PDF document text
    • https://s3.amazonaws.com/mafavuzenoliki/zakifaxexosigedexufuripu.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 extracted file (font_00_sfnt_off000060c0.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60C0 5416 bytes
SHA-256: 307954c136388e9bc6baed57c64b3b8f48ef468d9367b803458d139ea0297899
font_01_sfnt_off00007324.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7324 10952 bytes
SHA-256: d6885bcd8057941054cc061eadec21bbe4c07500c5818e66f995ad5724ae2724
font_02_sfnt_off00009876.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9876 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2