Malicious PDF — malware analysis report

Static analysis result for SHA-256 4601cd2e1ebf70c1…

MALICIOUS

PDF

47.8 KB Created: 2020-10-11 01:20:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 03b1eb3bc66ce2400f6bcda5698be2f1 SHA-1: 3537d633d31c2b588f35cd3e4ff1e446b3da9062 SHA-256: 4601cd2e1ebf70c141869611042ab13fffb70caa4888d722a269811a1b85bab6
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=australian+shepherd+training+guide In PDF document text
    • http://files.katefulcherconservation.com/uploads/1/3/1/0/131070539/zavonixolunewev.pdfIn PDF document text
    • http://files.houstonmemorialgolf.com/uploads/1/3/1/4/131407316/zutadanudez.pdfIn PDF document text
    • http://files.shanazpasha.com/uploads/1/3/0/7/130739023/f7e379832abf7f2.pdfIn PDF document text
    • http://files.area3apa.net/uploads/1/3/1/4/131453177/wosedexedubot.pdfIn PDF document text
    • http://files.mouthofasouthernrealtor.com/uploads/1/3/0/7/130738836/2207199.pdfIn PDF document text
    • https://site-1043259.mozfiles.com/files/1043259/97482451190.pdfIn PDF document text
    • https://site-1040352.mozfiles.com/files/1040352/bodujufivola.pdfIn PDF document text
    • https://site-1038530.mozfiles.com/files/1038530/vofumasogarasufobepagur.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/1/0434/1779/6775/files/2008_ap_calculus_ab_free_response_student_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/9447/8500/files/orange_county_map_florida.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/4055/9263/files/naming_polymers_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6370/4729/files/vc_andrews_casteel_series.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4a05728-9414-4c2f-b6c0-63b0b6bd57d6/rewuguwozobajitoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b95f379-1305-4a9d-a04c-6c042028eb91/xalivuf.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006fac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FAC 4984 bytes
SHA-256: 5fc53b2aed78927aeea9f14dda0e66a0532e0136181a9b16b203d7234fd5627f
font_01_sfnt_off00008085.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8085 10552 bytes
SHA-256: 8946a25699ef1b119dea248b5e1358abaef62ace4901ea300b27328865fc1faa
font_02_sfnt_off0000a441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA441 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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