Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cdb7bc9ce2bc29b…

MALICIOUS

PDF

48.3 KB Created: 2020-10-04 11:45:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: b4ba71d543b370ad95d0f44ef13ff357 SHA-1: 3cf7a8fb4830c5e4fb22742362bcfa6b2f4a3445 SHA-256: 1cdb7bc9ce2bc29b9e71a83e2f63133d1b0770efff31ecb2ab75e6e0bec19446
124 Risk Score

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 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://gettraff.ru/strik?keyword=dividing+decimals+worksheet+5th+grade+with+answers In PDF document text
    • https://site-1039902.mozfiles.com/files/1039902/jewumunebunidizoza.pdfIn PDF document text
    • https://site-1036965.mozfiles.com/files/1036965/mutogafi.pdfIn PDF document text
    • https://site-1037188.mozfiles.com/files/1037188/sebivaja.pdfIn PDF document text
    • https://site-1040080.mozfiles.com/files/1040080/38811745579.pdfIn PDF document text
    • https://site-1038493.mozfiles.com/files/1038493/bumogewisajetuzutefaxipo.pdfIn PDF document text
    • https://site-1037169.mozfiles.com/files/1037169/45657364682.pdfIn PDF document text
    • http://mojisiv.nataliemarie.org/uploads/1/3/1/4/131437502/kufixawaro_zopamisire.pdfIn PDF document text
    • http://files.deltatechindustrialpark.com/uploads/1/3/0/8/130814783/nowibadebu.pdfIn PDF document text
    • http://files.communitylifecompetence.org/uploads/1/3/0/8/130874489/3366850.pdfIn PDF document text
    • http://zuzaji.kaleidoscopegallery.net/uploads/1/3/2/8/132816091/rowemujijamotona.pdfIn PDF document text
    • http://gesuki.johnsonjacksonandassociate.com/uploads/1/3/1/4/131453019/xaminasudebufus_kozabaxoxob_ditizakavona_gewiz.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://uploads.strikinglycdn.com/files/8b8b88d2-43ec-4c9b-b48d-8c0420bf872c/84359061847.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7336851-f927-4857-91f6-dc4609b9db0d/871239593.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/063841c1-1f8f-4d33-9a92-ae1314191b65/80393185079.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bea42157-2f26-4bcf-8746-28e5ba30f2b3/75825594697.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c73d58d4-b67a-4a69-9bfc-4c075be6e4fc/niduwuzatajajikarus.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_off00006f3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F3D 5480 bytes
SHA-256: 260511c6a5b437f3b30253871171720fd2b35ed0f4a2621eea07efe41e555fae
font_01_sfnt_off000081c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81C9 10468 bytes
SHA-256: fb4707bc5e4abad17ad84298e5fa6eaf2c8583a622439da79b9600d902e6a7fe
font_02_sfnt_off0000a57c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA57C 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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