Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1d8fa6583d6cd7d…

MALICIOUS

PDF

43.4 KB Created: 2020-10-20 03:23:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b204387582479ed1580dff6017c9d39d SHA-1: fb8f8cdd8a1ae3ed5fc254ff1ecfc2c5a2f2b952 SHA-256: e1d8fa6583d6cd7d38a5943a3430d8b85aeb80207b1f080f3e100114733f8521
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://gettraff.ru/123?keyword=machinarium+download+for+android In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374979/normal_5f8e2567db1e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379217/normal_5f8db4bf0cf69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365542/normal_5f87899cb4aa2.pdfIn PDF document text
    • https://bavejojonosepes.weebly.com/uploads/1/3/1/3/131380601/pofutiluwonebifujofu.pdfIn PDF document text
    • https://worozimovazez.weebly.com/uploads/1/3/1/4/131406108/ganenexu.pdfIn PDF document text
    • https://vozutadisifik.weebly.com/uploads/1/3/1/4/131483249/zumenaxaja-jivaj-giluvatuju-kimuti.pdfIn PDF document text
    • https://sakuvajavabese.weebly.com/uploads/1/3/1/3/131383602/1146150.pdfIn PDF document text
    • https://meboguvogo.weebly.com/uploads/1/3/1/4/131437667/gebegi-titewobedozuru-xuzotinu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366661/normal_5f87257304157.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366407/normal_5f875dad88b31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366011/normal_5f89016bd434a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368982/normal_5f8ca1ee2cd94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366668/normal_5f8e0ed942764.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4ad6cad-9c08-41c4-bf41-4017b5a1dd36/75884855039.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b402763-f7cd-4d9d-a0c1-bf254ce30734/55087578481.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2d5c8d0-a2b1-4bbc-978c-c700daaea6f6/9658840133.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fe2313d-ae14-4715-8f44-a017c9faf20a/xivekok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3481e53b-fec5-4ae2-ac94-156ab5743edc/rk_bangia_law_of_contract_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/174ea97a-7a1b-4383-ae04-49b4167e88dd/jadoxikufejotisofipunexig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39cf98a1-3f84-42b5-885e-1db983f71506/97341892737.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0039c935-be3e-4974-ac0f-0585736af5c7/gojot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/749e9a05-4766-4852-b33a-d82a3c07ed5e/68813911407.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1068cd6a-8247-46fd-800c-c2128b5199db/patricia_king_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ded3482e-d991-43ea-a22a-724587774d9a/dexuludivowewifugexifelo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a40f994-c047-461f-8c7e-bda38192b938/27578447878.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_off00006ccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CCD 5180 bytes
SHA-256: 90f021349598a8541dbf495351bdf4bb8144b80b1055bdfec7af8cdbafe4fb84
font_01_sfnt_off00007e4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E4C 9888 bytes
SHA-256: 87828ce74ef0c1c464ca18337baf11c58ac52de575512cac5a312907e968e63a