Malicious PDF — malware analysis report

Static analysis result for SHA-256 04db38e0f71da38a…

MALICIOUS

PDF

50.8 KB Created: 2020-10-28 07:34:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 5025f9f5922b1716d1434291f1fe0e32 SHA-1: 51abe154d0264aa2245d233d0fdf70c1003bc42d SHA-256: 04db38e0f71da38a79c2d89104002a31321cab4a9cfed818dc6279af6748ce26
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://cctraff.ru/pify?keyword=super+mario+rpg+6+doors+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4407313/normal_5f98e7eb8fbde.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376404/normal_5f8d61a8d0f6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388627/normal_5f96935801041.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389606/normal_5f95d7fa8b08f.pdfIn PDF document text
    • https://xesaranit.weebly.com/uploads/1/3/2/6/132696194/6362055.pdfIn PDF document text
    • https://lozulijulejibog.weebly.com/uploads/1/3/1/8/131857057/c540b2152c6.pdfIn PDF document text
    • https://zoxaminajoge.weebly.com/uploads/1/3/1/6/131637873/26725a8e.pdfIn PDF document text
    • https://pinonomobeberex.weebly.com/uploads/1/3/4/3/134318871/jamivuti-senegizot-sinizuxaru-kasavezesu.pdfIn PDF document text
    • https://sepenunaxob.weebly.com/uploads/1/3/0/7/130776074/noromokubuti_rejinokusatopev_kozajaxufu.pdfIn PDF document text
    • https://nulivoji.weebly.com/uploads/1/3/4/3/134343303/8572092.pdfIn PDF document text
    • https://redunexodozik.weebly.com/uploads/1/3/0/8/130814050/tiluronor.pdfIn PDF document text
    • https://texitanoz.weebly.com/uploads/1/3/0/7/130739996/kamojojumenojape.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00008642.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00008642.bin)
    • https://s3.amazonaws.com/jamokaroxoj/tax_amnesty_scheme_2018_pakistan.pdfIn PDF document text
    • https://s3.amazonaws.com/domegagowevag/megebegakotorurozexoge.pdfIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/wajunozufatekelezisuzu.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/wowevigopuxogopawibi.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/kukipipemopasojibufal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/1070/6619/files/58912714397.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/2079/0178/files/jarurojesel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3841/1422/files/life_saving_rules_shell.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3897/3345/files/88459264473.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/7616/9109/files/zigomokavukaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5018/0001/files/64864271030.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/0228/1123/files/lidanagerabuda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4587/7922/files/camp_counselor_resume_skills.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6815/3239/files/gofulavotada.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_off00008642.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008642.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8642 5504 bytes
SHA-256: 8b92676d62f85766a9fb19e35160214432355b3991c0664473a688633aa86690
font_01_sfnt_off000098d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98D6 10724 bytes
SHA-256: 0d8556efe8373df4c35fda077ecff7ef661ba0d664ebb1b2aef5aa91885af7ac