Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcc7aba9720acf29…

MALICIOUS

PDF

42.2 KB Created: 2020-10-18 20:44:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 4489dcdeb2eed93a7f085b2e7172e16f SHA-1: 7fe937bd108c9d291946b7157ebb99740c574d80 SHA-256: fcc7aba9720acf295dd3350463db847d70b58de58363a984be968f9e78895caa
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=photive+cyren+2 In PDF document text
    • https://naroxelilokatud.weebly.com/uploads/1/3/1/3/131384214/eff4a21a499a3.pdfIn PDF document text
    • https://zulatikuwa.weebly.com/uploads/1/3/0/7/130776211/2745832.pdfIn PDF document text
    • https://tunimesepet.weebly.com/uploads/1/3/1/4/131455680/dd8fc27247b13.pdfIn PDF document text
    • https://lebabipiw.weebly.com/uploads/1/3/0/9/130968925/zujuvezofibapowe.pdfIn PDF document text
    • https://pisanofinupu.weebly.com/uploads/1/3/1/4/131437881/3397340.pdfIn PDF document text
    • https://jawowigo.weebly.com/uploads/1/3/0/7/130774982/jerugoka_javun_ronulavotijogif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365635/normal_5f873a20df34d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367944/normal_5f88fb4e867d7.pdfIn PDF document text
    • https://mupibidegupek.weebly.com/uploads/1/3/0/8/130874042/xatuxuz.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/8c3f11ed.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/wadalopeguvo.pdfIn PDF document text
    • https://wefejakero.weebly.com/uploads/1/3/0/8/130814310/6958567.pdfIn PDF document text
    • https://gazesomudari.weebly.com/uploads/1/3/1/0/131070071/5625406.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8546/6267/files/tv_guide_sioux_falls.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9163/1509/files/mofoxaderujap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3540/1633/files/dufezegutisipub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/5317/8791/files/the_mist_walker.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/0029/8144/files/71071776050.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/3819/4843/files/43003185562.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0487/9748/3173/files/59120631539.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_off0000682d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x682D 4764 bytes
SHA-256: 48909c1a22e3abcf92d28552e73dc4e7b0ee9f3ab82355f23c491aad9fc8378d
font_01_sfnt_off00007869.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7869 10356 bytes
SHA-256: 55abe1521acae96bc49d28bf98b6f1a9e4d3b4546f9a74cc4b7d8294a98ae646

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