Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a99c5c3b6f285ef…

MALICIOUS

PDF

49.9 KB Created: 2020-10-19 08:46:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: e0d250d9ea538844056303e8ad7176a9 SHA-1: f9d678df854c5024fb41debef1c1f0ab2fffbd65 SHA-256: 7a99c5c3b6f285efe3b423d7b6a56cc764c1942b514e37228b9b5064bc3fc460
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=operating+system+design+and+implementation+pdf In PDF document text
    • https://kabudededawizo.weebly.com/uploads/1/3/1/3/131383409/tabolerelivadezagulu.pdfIn PDF document text
    • https://buliduxefexefux.weebly.com/uploads/1/3/1/6/131636978/dutorewal.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0479/1671/2100/files/boss_gt-1_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/3876/1109/files/newige.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/1541/4175/files/bafimujurinevax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/1791/6575/files/budget_tool_app_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/4255/4015/files/contour_lines_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/9661/9193/files/zutovebekuxojep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0061/7381/files/96432759491.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/0663/1325/files/6189764162.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/7069/6855/files/xawimetejisowawitazix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6773/6225/files/fb_lite_app_apk_latest_version.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14034dfd-faf5-4007-922a-c0f899f3e376/download_midnight_club_3_dub_edition_psp_highly_compressed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/909aea73-df70-4340-9717-800cc1edc9e4/33407416689.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7ef987b-40c5-441e-84b9-5712292d5630/81370762972.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/2478/7867/files/bronx_zoo_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3359/9893/files/52606426460.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0385/3476/files/chaliapin_steak_donburi_rezept.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/4723/8811/files/who_are_the_three_founders_of_sociology.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007775.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7775 5280 bytes
SHA-256: a4535a8a0d5f75b3b0958a1e5d8e030e53f564e15282b9689404d3c13e3f35f6
font_01_sfnt_off00008952.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8952 10144 bytes
SHA-256: 4370d56c02dcedc9d14d130cbb050102ce311a81b8ef23f113bf2db9cad4b2fb
font_02_sfnt_off0000ac04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC04 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

Open this report in the interactive analyzer, or submit your own file for analysis.