Malicious PDF — malware analysis report

Static analysis result for SHA-256 e62a920c81684511…

MALICIOUS

PDF

51.0 KB Created: 2020-10-15 14:38:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: a044f210a8f1171279a42240b3a0f74a SHA-1: 615d09e103baf66846579e04dd87440a79f4d215 SHA-256: e62a920c816845113dc65b8297a6886133fa8e5b67a60325d1e912d6c399fcb9
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=ragnarok+mobile+swordsman+build+guide In PDF document text
    • https://site-1044515.mozfiles.com/files/1044515/43364332506.pdfIn PDF document text
    • https://site-1041773.mozfiles.com/files/1041773/mojipabebobekezeki.pdfIn PDF document text
    • https://site-1048550.mozfiles.com/files/1048550/vuvonizaj.pdfIn PDF document text
    • https://gozofuma.weebly.com/uploads/1/3/0/8/130874065/759e1.pdfIn PDF document text
    • https://megadezatesaram.weebly.com/uploads/1/3/0/7/130776649/jojanofale_kopoz_pijinetotabu_novusaz.pdfIn PDF document text
    • https://xonuguzuv.weebly.com/uploads/1/3/1/3/131382030/mawuloze.pdfIn PDF document text
    • https://kagilovudugavap.weebly.com/uploads/1/3/1/1/131164538/04290a.pdfIn PDF document text
    • https://meboguvogo.weebly.com/uploads/1/3/1/4/131437667/lisibojuk.pdfIn PDF document text
    • https://riwisasivituw.weebly.com/uploads/1/3/1/0/131070703/146d032f56d235.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/laresisif_kigadebokenub_bajutinerid.pdfIn PDF document text
    • https://jabiratunibi.weebly.com/uploads/1/3/2/6/132683422/2967354.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366041/normal_5f87d188bd481.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366645/normal_5f87e7074659b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366395/normal_5f87bf1ab2f4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367283/normal_5f874ff6db0a7.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/1/0482/4268/8154/files/animal_onesies_for_adults_uk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/3489/8332/files/red_headed_skink_bite.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/3562/3076/files/minecraft_bad_request.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0467/5665/9363/files/wavogetidojewelififakut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/5302/6975/files/86526784649.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fbdc0a2-abc7-4432-b2bf-6385982f3658/repagikozaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91cd0aa5-1d8e-471d-9ec3-8c1157563aec/zudulodawokug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e046c620-e8f3-4c5d-a332-52e6a78d878f/jerora.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_off00007b1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B1C 5252 bytes
SHA-256: 36b37b328d9effde387f5fedf0d7bd5e8ae5b8876711703a7d8a31af7981afdb
font_01_sfnt_off00008ce2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CE2 10256 bytes
SHA-256: 6d7f08562d2d4ca22ff2904aaea139c30e78a1c66a199995c3d0e395ac6f11f7
font_02_sfnt_off0000aff5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFF5 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3