Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d52698087c1c485…

MALICIOUS

PDF

46.4 KB Created: 2020-11-01 16:59:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: 7cf0c50628a9f4d1f0e1ea9c31b62e09 SHA-1: 1b21e9bb82e19ef98c5160f1fc654545fa4d5405 SHA-256: 7d52698087c1c485e2a082f35d6be774ceb51c0ba5969b825c5bdd02626bc691
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/aws?keyword=half+wild+read+online+free In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369768/normal_5f894d7b6c122.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/1/0483/7261/3280/files/study_skills_online_games_for_middle_school.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0506/1004/5085/files/subeluroxusupasitaman.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c5c700c-a25f-401e-b2d8-800e0250f5b1/the_complete_medicinal_herbal_penelope_ody.pdfIn PDF document text
    • https://s3.amazonaws.com/xovajukoxin/85265054757.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/pasemaza.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/xazeverezupajubukazefobiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/509df4bc-9e10-40b1-8550-69eb994ef88c/10593161497.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3135bcd6-6f45-46ee-8a63-bbd1bcf14427/palme_11._snf_kimya.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9604/2398/files/bench_warrant_search_york_county_sc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45ba29ef-60d0-4b8b-ace4-aeb4e303bb0b/fifemovonawidulovaduwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72e99040-c1c6-4f0b-8787-91ea7b2027ab/bulolobenag.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/73968863071.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/86379834198.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb20334b-9b81-4093-a5c1-af4a7a32ffc7/lafizexuxanar.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_off00007820.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7820 4776 bytes
SHA-256: d7871fee9f79cb8f69e7bb8c239ad0269b970e799d9046eff98ea3f7101ea4e3
font_01_sfnt_off0000887f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x887F 10812 bytes
SHA-256: 3ffa63a8d03dbf524a8fd0626eb6bc2506cc523b78012b70e8e7cc36c66ed9e9

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