Malicious PDF — malware analysis report

Static analysis result for SHA-256 90fe85b319ffbe16…

MALICIOUS

PDF

70.6 KB Created: 2021-02-19 12:38:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: ca3177615ca3bd8a72902a7cf3d28a5d SHA-1: 417f32ed53440b9103f9e5fa7317161b8717e0c4 SHA-256: 90fe85b319ffbe166efdf3c6dcd2a19a8ab4cc3f822bd41f06665a6bc8ec3186
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://maypoin.ru/wix?keyword=bob+revolution+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4449422/normal_5fe9ac87ea98b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487918/normal_5fd33f863f95c.pdfIn PDF document text
    • https://lidovoji.weebly.com/uploads/1/3/4/3/134313359/legesesafagid_jomal_vutifatixivoku_jekibuxu.pdfIn PDF document text
    • https://putujagojosid.weebly.com/uploads/1/3/0/7/130738675/vivewejedakozig-jetafow-fewiv.pdfIn PDF document text
    • https://makojinoguj.weebly.com/uploads/1/3/1/4/131406607/7778846.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385863/normal_5fc7b9d954356.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382778/normal_5ff64d7ca5655.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486033/normal_6003eb144e2a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427519/normal_5fe660fab0643.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449775/normal_6021c474570f9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475383/normal_5fd085a21e2c3.pdfIn PDF document text
    • https://zazanopub.weebly.com/uploads/1/3/2/7/132712119/xilavikovovuf.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/sedowedi/malayalam_movies_hd_tamilrockers.pdfIn PDF document text
    • https://s3.amazonaws.com/liwara/recipe_template_for_pages_ipad.pdfIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/critical_chain_goldratt_book_review.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/rebisisimijado.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/raboxewawesafazawe.pdfIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/8265007474.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_off0000d902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD902 4904 bytes
SHA-256: 04d52eacdf68b541ad1c6b49bcd31f0aa9c0d159d6bcdeea331c0da5170ed374
font_01_sfnt_off0000e99a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE99A 10424 bytes
SHA-256: 24def40b65258f0c78262001ab575e79d57ff137433e4f3806186957fb3f4144

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