Malicious PDF — malware analysis report

Static analysis result for SHA-256 62eaf4dbf88e8ac9…

MALICIOUS

PDF

60.3 KB Created: 2020-10-25 21:11:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: ec040efea7949e406b9c0391712a993a SHA-1: 80d3a287008818b398d3111fd5ea1db14bea10f9 SHA-256: 62eaf4dbf88e8ac97de33bcb84c87929ad3daba35744790e84749f88204cd2a2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector identified by heuristics. This suggests the PDF is designed to lure users to a malicious site, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://ggtraff.ru/aws?keyword=arithmetic+and+geometric+sequences+word+problems+with+answers+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369772/normal_5f90084b7e035.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383687/normal_5f935d68be3e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371248/normal_5f8c2823be886.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393485/normal_5f91d6b27e75a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365626/normal_5f8a6a03e93d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375891/normal_5f90bb2be9f28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366339/normal_5f870d94ea799.pdfIn PDF document text
    • https://vefavufarexuba.weebly.com/uploads/1/3/4/3/134315694/waloborasim.pdfIn PDF document text
    • https://wusinetowaje.weebly.com/uploads/1/3/4/4/134471696/sigamiromifemog.pdfIn PDF document text
    • https://ralerafuzirepob.weebly.com/uploads/1/3/4/3/134386916/843f6d926b762.pdfIn PDF document text
    • https://rikisuluwujufa.weebly.com/uploads/1/3/1/4/131452938/tupigidu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366367/normal_5f9377ac2fd48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369173/normal_5f87a23002c47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384650/normal_5f92d40453be0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378410/normal_5f8b065cda162.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/f41db6f2-e008-46ca-a18f-5c705ab2e948/34301000661.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19155cc9-1fa3-4631-baf2-671d25a86e9c/sigetopidixawoxixoxoje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06f97f2e-3d24-408a-a42f-e61f26546c99/Weihnachtsbotschaft_an_Schler_vom_L.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/426ea798-7d1b-4215-9580-b098c1f18404/dofonumipilukafegasulugex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99bfe3cd-6367-46b7-a7e2-0d0e640bd8ce/befisikerobovomigaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a436137b-0ca7-4f74-83c5-ea7118d7b38c/vuzamapifodota.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a065bfe6-e663-4b2d-927a-258057435ddb/90133309593.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dabe34d5-f56b-4aca-afa6-d10685e76710/gelijinasimotaki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/155be271-160e-44aa-83e5-b34ea7a0b084/wojufaselazolivisubobugon.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_off0000aad7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAAD7 5916 bytes
SHA-256: c81a5d78e93eb3ae282b52ee630d473cb86175365a7594408d7115f0cdac6951
font_01_sfnt_off0000becf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBECF 10632 bytes
SHA-256: cbd65eed457a249d7e749f33e2baca46cfa0f760ba9ee14c02cd5fb04a46ea2e

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