Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c1cd10253a8cc2f…

MALICIOUS

PDF

48.1 KB Created: 2020-10-28 12:42:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-10
MD5: 051ebcdd217f0c816a076c441dba8e85 SHA-1: 7799a0a2dc9056268c5e395da00235c4ff2d8451 SHA-256: 2c1cd10253a8cc2f02a66ead1e15c6d2983a714df857d321b5bf8b3312db86e6
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=trumpet+valve+oil+recipe In PDF document text
    • https://solujokorox.weebly.com/uploads/1/3/4/1/134108712/2957965.pdfIn PDF document text
    • https://komamopiragi.weebly.com/uploads/1/3/4/4/134444029/d270e9c8cdb4bb.pdfIn PDF document text
    • https://xujaxivef.weebly.com/uploads/1/3/1/4/131438557/8d8a303496e8cf.pdfIn PDF document text
    • https://nijubalalo.weebly.com/uploads/1/3/1/4/131453980/najikod-wijojekitotorol-jupaw-ganurivuvuset.pdfIn PDF document text
    • https://kuzaloxamuw.weebly.com/uploads/1/3/1/4/131406684/zajedan.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00007106.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00007106.bin)
    • http://www.daltonmaag.com/In extracted file (font_02_sfnt_off0000a4f1.bin)
    • https://s3.amazonaws.com/henghuili-files/gagezuzekodanimogezej.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/59409662481.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4254/9145/files/womefufexewofu.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/87112968153.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/7276/6119/files/3001537223.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/acceleration_word_problems.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/56232848500.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/1791/6575/files/97345522290.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/97513405289.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/9331/0631/files/nijobenuvuvelal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/2301/5320/files/fasagezebitinesizim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa44c073-52ec-44d2-b272-9ed6c9a3fe58/watutakesozobaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4afb53f-afe3-4cfb-90da-b40f8786587a/civilization_5_community_balance_mod.pdfIn PDF document text
    • https://s3.amazonaws.com/lomogas/kolifuv.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_off00007106.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007106.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7106 4684 bytes
SHA-256: 734b6309e3b7582652e646aa1cca0a62b8e6f10d82f97b3d22d19a822c9ca6b9
font_01_sfnt_off000080fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80FB 10512 bytes
SHA-256: 2266b73c04626bc359ddc06902f591c17dc3b3567e59e66e7b68911f01483e32
font_02_sfnt_off0000a4f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA4F1 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176