Malicious PDF — malware analysis report

Static analysis result for SHA-256 af07f42bd023991c…

MALICIOUS

PDF

50.3 KB Created: 2020-10-23 11:33:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 64af14fb1e8adfa255dbe8d16cc82de2 SHA-1: 231195c18ce2d45d759c3b0bc3d524b300275a7a SHA-256: af07f42bd023991c7c286e3202177b1db1218a09f9009d2bd31744293834a1d9
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/strik?keyword=le+pronom+tonique+exercices In PDF document text
    • https://povutepumik.weebly.com/uploads/1/3/2/7/132741486/ririxuxikasod.pdfIn PDF document text
    • https://junoxavod.weebly.com/uploads/1/3/1/3/131384771/6215952.pdfIn PDF document text
    • https://jedunaxalow.weebly.com/uploads/1/3/1/6/131606453/5365052.pdfIn PDF document text
    • https://muzaromiv.weebly.com/uploads/1/3/4/3/134380281/16057.pdfIn PDF document text
    • https://viweposedijul.weebly.com/uploads/1/3/1/0/131070314/tozofewebez.pdfIn PDF document text
    • https://nubojubixuxo.weebly.com/uploads/1/3/1/4/131410311/wibakuwunorutal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368770/normal_5f8c408e02f6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376852/normal_5f8e2f5be97e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368218/normal_5f8847cea4718.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372378/normal_5f90388d49001.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368758/normal_5f8d5f9ba7184.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_01_sfnt_off00007fae.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_01_sfnt_off00007fae.bin)
    • https://s3.amazonaws.com/zirojopemup/types_of_genetic_polymorphism.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/xijinutulusuzisafikela.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/pagivof.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/winebuxoselokoxum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2414/4789/files/25452070174.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/0234/1794/files/archie_bell_and_the_drells_tighten_up_dance.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/1688/6678/files/dizolegalabegenuruzonu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/1780/0350/files/joe_devers_lone_wolf_complete_apk_obb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7026/7300/files/74011964350.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/3160/8487/files/lusubazefuzenatilatugam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3738/5123/files/66125978491.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5865/7430/files/ponufuvu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9650/6521/files/5e_knowledge_cleric_guide.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_01_sfnt_off00007fae.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C45 5636 bytes
SHA-256: e6ad7ed970c91815ac16d8a7eb09af7215c4ca469865f345009807b40697e819
font_01_sfnt_off00007fae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FAE 4972 bytes
SHA-256: 5df1e06cd248f60d3b236861e5c2e3387cbbf2bb63d6afa3cd6c9ba59c56abf1
font_02_sfnt_off00009091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9091 13160 bytes
SHA-256: 615e408c1ff8e2919c512584ebf2f5609ac32797622a2361b1e0507e275cfb1d