Malicious PDF — malware analysis report

Static analysis result for SHA-256 658427d4327901a7…

MALICIOUS

PDF

42.6 KB Created: 2020-10-04 00:42:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: e995ead2ec2664b8f3158815fe93c19d SHA-1: 8618adb81812cf4a433f894ce04978e338d076b0 SHA-256: 658427d4327901a7600465c9d051f1cfb490e0a55ed52f7c5fa4ddd1ed6e6f73
184 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=dr+kawashima%2527+s+brain+training+app+android In PDF document text
    • http://buketozi.oakwoodvethospital.com/uploads/1/3/1/8/131871405/kivekij-mogege-misadesi-falozetulud.pdfIn PDF document text
    • http://pupidog.parentlednetwork.org/uploads/1/3/2/8/132815002/gebibosukitu_giviv_sakaroj.pdfIn PDF document text
    • http://files.decoysales.com/uploads/1/3/2/6/132681488/22b2066b.pdfIn PDF document text
    • http://towesor.connectingmyanmar.org/uploads/1/3/0/8/130813799/926a61553ec9b46.pdfIn PDF document text
    • http://ledifaro.simplycreativetreasures.com/uploads/1/3/1/6/131606271/25a91937a.pdfIn PDF document text
    • https://site-1037882.mozfiles.com/files/1037882/10137159967.pdfIn PDF document text
    • https://site-1042635.mozfiles.com/files/1042635/95355427498.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0112/1432/files/xolanaxuzusira.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8837/4680/files/transfer_of_thermal_energy_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b37c2664-47d2-4b9d-accd-09ed0171c336/84590958111.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bc3557d-2f4d-49de-bdb9-86d55aad40f6/84077840924.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9718825e-5e3a-408e-a739-cb29b1419ae1/rabatozojofoxosotebi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa14af91-d515-4d41-ab86-77cc5e42f55b/65941429161.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_off000065b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65B9 5672 bytes
SHA-256: ccc01accdbf38608573e8940c914e1779b66281efe81b810921efd4ba095e951
font_01_sfnt_off000078f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78F8 10808 bytes
SHA-256: f9a5cab8f2c81a138dc4b3307ab1498e8ff63e9a6bb1e8d2c779df9771237dfc

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