Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a19039d1b6c139b…

MALICIOUS

PDF

43.3 KB Created: 2020-09-30 10:16:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 37d5a47ba0dc5fdeadba9cdfec1f961f SHA-1: 85cc506314f4ec2ed179f0c7217cb583ad97ff3e SHA-256: 3a19039d1b6c139b33ab3285a429b40e75daf8d6731ac93b03eb405b5ea03973
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://gettraff.ru/strik?keyword=esthetician+resume+pdf In PDF document text
    • https://site-1037191.mozfiles.com/files/1037191/37269280817.pdfIn PDF document text
    • https://site-1037240.mozfiles.com/files/1037240/xufogap.pdfIn PDF document text
    • http://files.comelovecanada.com/uploads/1/3/0/7/130775980/9805480.pdfIn PDF document text
    • http://files.ccpotters.org/uploads/1/3/2/6/132681657/c4f5ebc.pdfIn PDF document text
    • http://files.quicktan423.com/uploads/1/3/1/4/131455903/gebuvogibudoxu_geguxu.pdfIn PDF document text
    • https://site-1036993.mozfiles.com/files/1036993/sodujesaxu.pdfIn PDF document text
    • https://site-1036745.mozfiles.com/files/1036745/ruduwi.pdfIn PDF document text
    • https://site-1036982.mozfiles.com/files/1036982/xewatutimufebo.pdfIn PDF document text
    • https://site-1036649.mozfiles.com/files/1036649/68953476625.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/14fb55c7-90a0-4e41-9695-e930b2b6b4cb/xexuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b4c118e-18cb-4ba0-b085-c78ce032eb44/navuxigaritivu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7a7fe77-264e-456b-a743-3f47c0c051bd/74526854435.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f5db7c9-0979-48a9-9f97-865438056a71/29590413052.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/610e5c4f-a578-44bf-aa68-60e44cae996a/78347711442.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_off00006aef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AEF 5320 bytes
SHA-256: 6ea0a43d19c37be5c5dee91387bab4980176955e7598e51d99dc29c7a9992aa5
font_01_sfnt_off00007ce4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CE4 10448 bytes
SHA-256: 41915385510dfdd3fcfbbba43c7bc7f77ebe9d33ca2b923955af6c5180bbeb2f

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